diff --git a/frontend/src/AppContent.vue b/frontend/src/AppContent.vue
index e3aefe4..3991122 100644
--- a/frontend/src/AppContent.vue
+++ b/frontend/src/AppContent.vue
@@ -1,21 +1,25 @@
 <script setup>
-import ContentPane from './components/ContentPane.vue'
-import NavigationPane from './components/NavigationPane.vue'
+import ContentPane from './components/content/ContentPane.vue'
+import DatabasePane from './components/sidebar/DatabasePane.vue'
 import { computed, nextTick, onMounted, provide, reactive, ref } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { GetPreferences } from '../wailsjs/go/storage/PreferencesStorage.js'
 import { get } from 'lodash'
 import { useThemeVars } from 'naive-ui'
 import NavMenu from './components/NavMenu.vue'
+import ConnectionPane from './components/sidebar/ConnectionPane.vue'
+import ContentServerPane from './components/content/ContentServerPane.vue'
+import useTabStore from './stores/tab.js'
 
 const themeVars = useThemeVars()
 
 const data = reactive({
-    asideWith: 300,
+    navMenuWidth: 60,
     hoverResize: false,
     resizing: false,
 })
 
+const tabStore = useTabStore()
 const preferences = ref({})
 provide('preferences', preferences)
 const i18n = useI18n()
@@ -34,7 +38,7 @@ const getFontSize = computed(() => {
 
 const handleResize = (evt) => {
     if (data.resizing) {
-        data.asideWith = Math.max(evt.clientX, 300)
+        tabStore.asideWidth = Math.max(evt.clientX - data.navMenuWidth, 300)
     }
 }
 
@@ -52,7 +56,7 @@ const startResize = () => {
 }
 
 const asideWidthVal = computed(() => {
-    return data.asideWith + 'px'
+    return tabStore.asideWidth + 'px'
 })
 
 const dragging = computed(() => {
@@ -62,22 +66,51 @@ const dragging = computed(() => {
 
 <template>
     <!-- app content-->
-    <div id="app-container" :class="{ dragging: dragging }" class="flex-box-h">
-        <nav-menu />
-        <div id="app-side" :style="{ width: asideWidthVal }" class="flex-box-h flex-item">
-            <navigation-pane class="flex-item-expand"></navigation-pane>
-            <div
-                :class="{
-                    'resize-divider-hover': data.hoverResize,
-                    'resize-divider-drag': data.resizing,
-                }"
-                class="resize-divider"
-                @mousedown="startResize"
-                @mouseout="data.hoverResize = false"
-                @mouseover="data.hoverResize = true"
-            ></div>
+    <div id="app-container" :class="{ dragging }" class="flex-box-h">
+        <nav-menu v-model:value="tabStore.nav" :width="data.navMenuWidth" />
+        <!-- structure page-->
+        <div v-show="tabStore.nav === 'structure'" class="flex-box-h flex-item-expand">
+            <div id="app-side" :style="{ width: asideWidthVal }" class="flex-box-h flex-item">
+                <database-pane
+                    v-for="t in tabStore.tabs"
+                    v-show="get(tabStore.currentTab, 'name') === t.name"
+                    :key="t.name"
+                    class="flex-item-expand"
+                />
+                <div
+                    :class="{
+                        'resize-divider-hover': data.hoverResize,
+                        'resize-divider-drag': data.resizing,
+                    }"
+                    class="resize-divider"
+                    @mousedown="startResize"
+                    @mouseout="data.hoverResize = false"
+                    @mouseover="data.hoverResize = true"
+                />
+            </div>
+            <content-pane class="flex-item-expand" />
         </div>
-        <content-pane class="flex-item-expand" />
+
+        <!-- server list page -->
+        <div v-show="tabStore.nav === 'server'" class="flex-box-h flex-item-expand">
+            <div id="app-side" :style="{ width: asideWidthVal }" class="flex-box-h flex-item">
+                <connection-pane class="flex-item-expand" />
+                <div
+                    :class="{
+                        'resize-divider-hover': data.hoverResize,
+                        'resize-divider-drag': data.resizing,
+                    }"
+                    class="resize-divider"
+                    @mousedown="startResize"
+                    @mouseout="data.hoverResize = false"
+                    @mouseover="data.hoverResize = true"
+                />
+            </div>
+            <content-server-pane class="flex-item-expand" />
+        </div>
+
+        <!-- log page -->
+        <div v-show="tabStore.nav === 'log'">display log</div>
     </div>
 </template>
 
diff --git a/frontend/src/components/ContentToolbar.vue b/frontend/src/components/ContentToolbar.vue
index f895994..eb649e3 100644
--- a/frontend/src/components/ContentToolbar.vue
+++ b/frontend/src/components/ContentToolbar.vue
@@ -5,11 +5,11 @@ import Delete from './icons/Delete.vue'
 import Edit from './icons/Edit.vue'
 import Refresh from './icons/Refresh.vue'
 import Timer from './icons/Timer.vue'
-import RedisTypeTag from './RedisTypeTag.vue'
-import useConnectionStore from '../stores/connection.js'
+import RedisTypeTag from './common/RedisTypeTag.vue'
 import { useI18n } from 'vue-i18n'
 import { useMessage } from 'naive-ui'
-import IconButton from './IconButton.vue'
+import IconButton from './common/IconButton.vue'
+import useConnectionStore from '../stores/connections.js'
 
 const props = defineProps({
     server: String,
diff --git a/frontend/src/components/NavMenu.vue b/frontend/src/components/NavMenu.vue
index 3c14933..f15e0b3 100644
--- a/frontend/src/components/NavMenu.vue
+++ b/frontend/src/components/NavMenu.vue
@@ -1,23 +1,38 @@
 <script setup>
-import { computed, h, ref } from 'vue'
+import { computed, h } from 'vue'
 import { NIcon, useThemeVars } from 'naive-ui'
 import ToggleDb from './icons/ToggleDb.vue'
 import { useI18n } from 'vue-i18n'
 import ToggleServer from './icons/ToggleServer.vue'
-import IconButton from './IconButton.vue'
+import IconButton from './common/IconButton.vue'
 import Config from './icons/Config.vue'
 import useDialogStore from '../stores/dialog.js'
 import Github from './icons/Github.vue'
 import { BrowserOpenURL } from '../../wailsjs/runtime/runtime.js'
+import Log from './icons/Log.vue'
+import useConnectionStore from '../stores/connections.js'
 
 const themeVars = useThemeVars()
 
-const iconSize = 26
-const selectedMenu = ref('server')
+const props = defineProps({
+    value: {
+        type: String,
+        default: 'server',
+    },
+    width: {
+        type: Number,
+        default: 60,
+    },
+})
+
+const emit = defineEmits(['update:value'])
+
+const iconSize = computed(() => Math.floor(props.width * 0.4))
 const renderIcon = (icon) => {
     return () => h(NIcon, null, { default: () => h(icon) })
 }
 
+const connectionStore = useConnectionStore()
 const i18n = useI18n()
 const menuOptions = computed(() => {
     return [
@@ -25,13 +40,18 @@ const menuOptions = computed(() => {
             label: i18n.t('structure'),
             key: 'structure',
             icon: renderIcon(ToggleDb),
-            show: true,
+            show: connectionStore.anyConnectionOpened,
         },
         {
             label: i18n.t('server'),
             key: 'server',
             icon: renderIcon(ToggleServer),
         },
+        {
+            label: i18n.t('log'),
+            key: 'log',
+            icon: renderIcon(Log),
+        },
     ]
 })
 
@@ -74,12 +94,19 @@ const openGithub = () => {
 </script>
 
 <template>
-    <div id="app-nav-menu" class="flex-box-v">
+    <div
+        id="app-nav-menu"
+        :style="{
+            width: props.width + 'px',
+        }"
+        class="flex-box-v"
+    >
         <n-menu
-            v-model:value="selectedMenu"
+            :collapsed-width="props.width"
+            :value="props.value"
             :collapsed="true"
             :collapsed-icon-size="iconSize"
-            :collapsed-width="60"
+            @update:value="(val) => emit('update:value', val)"
             :options="menuOptions"
         ></n-menu>
         <div class="flex-item-expand"></div>
@@ -101,7 +128,7 @@ const openGithub = () => {
 
 <style lang="scss">
 #app-nav-menu {
-    width: 60px;
+    //width: 60px;
     height: 100vh;
     border-right: var(--border-color) solid 1px;
 
diff --git a/frontend/src/components/EditableTableColumn.vue b/frontend/src/components/common/EditableTableColumn.vue
similarity index 86%
rename from frontend/src/components/EditableTableColumn.vue
rename to frontend/src/components/common/EditableTableColumn.vue
index 6ffd3f4..bec23b0 100644
--- a/frontend/src/components/EditableTableColumn.vue
+++ b/frontend/src/components/common/EditableTableColumn.vue
@@ -1,9 +1,9 @@
 <script setup>
 import IconButton from './IconButton.vue'
-import Delete from './icons/Delete.vue'
-import Edit from './icons/Edit.vue'
-import Close from './icons/Close.vue'
-import Save from './icons/Save.vue'
+import Delete from '../icons/Delete.vue'
+import Edit from '../icons/Edit.vue'
+import Close from '../icons/Close.vue'
+import Save from '../icons/Save.vue'
 
 const props = defineProps({
     bindKey: String,
diff --git a/frontend/src/components/EditableTableRow.vue b/frontend/src/components/common/EditableTableRow.vue
similarity index 100%
rename from frontend/src/components/EditableTableRow.vue
rename to frontend/src/components/common/EditableTableRow.vue
diff --git a/frontend/src/components/IconButton.vue b/frontend/src/components/common/IconButton.vue
similarity index 100%
rename from frontend/src/components/IconButton.vue
rename to frontend/src/components/common/IconButton.vue
diff --git a/frontend/src/components/RedisTypeTag.vue b/frontend/src/components/common/RedisTypeTag.vue
similarity index 93%
rename from frontend/src/components/RedisTypeTag.vue
rename to frontend/src/components/common/RedisTypeTag.vue
index 0beafcd..d4488df 100644
--- a/frontend/src/components/RedisTypeTag.vue
+++ b/frontend/src/components/common/RedisTypeTag.vue
@@ -1,6 +1,6 @@
 <script setup>
 import { computed } from 'vue'
-import { types, validType } from '../consts/support_redis_type.js'
+import { types, validType } from '../../consts/support_redis_type.js'
 
 const props = defineProps({
     type: {
diff --git a/frontend/src/components/Toolbar.vue b/frontend/src/components/common/Toolbar.vue
similarity index 100%
rename from frontend/src/components/Toolbar.vue
rename to frontend/src/components/common/Toolbar.vue
diff --git a/frontend/src/components/ContentPane.vue b/frontend/src/components/content/ContentPane.vue
similarity index 61%
rename from frontend/src/components/ContentPane.vue
rename to frontend/src/components/content/ContentPane.vue
index 624800e..6ce17a7 100644
--- a/frontend/src/components/ContentPane.vue
+++ b/frontend/src/components/content/ContentPane.vue
@@ -1,13 +1,16 @@
 <script setup>
 import { computed } from 'vue'
-import { types } from '../consts/support_redis_type.js'
-import ContentValueHash from './content_value/ContentValueHash.vue'
-import ContentValueList from './content_value/ContentValueList.vue'
-import ContentValueString from './content_value/ContentValueString.vue'
-import ContentValueSet from './content_value/ContentValueSet.vue'
-import ContentValueZset from './content_value/ContentValueZset.vue'
+import { types } from '../../consts/support_redis_type.js'
+import ContentValueHash from '../content_value/ContentValueHash.vue'
+import ContentValueList from '../content_value/ContentValueList.vue'
+import ContentValueString from '../content_value/ContentValueString.vue'
+import ContentValueSet from '../content_value/ContentValueSet.vue'
+import ContentValueZset from '../content_value/ContentValueZSet.vue'
 import { isEmpty, map, toUpper } from 'lodash'
-import useTabStore from '../stores/tab.js'
+import useTabStore from '../../stores/tab.js'
+import { useDialog } from 'naive-ui'
+import useConnectionStore from '../../stores/connections.js'
+import { useI18n } from 'vue-i18n'
 
 const valueComponents = {
     [types.STRING]: ContentValueString,
@@ -17,6 +20,8 @@ const valueComponents = {
     [types.ZSET]: ContentValueZset,
 }
 
+const dialog = useDialog()
+const connectionStore = useConnectionStore()
 const tabStore = useTabStore()
 const tab = computed(() =>
     map(tabStore.tabs, (item) => ({
@@ -52,9 +57,24 @@ const onAddTab = () => {
     tabStore.newBlankTab()
 }
 
+const i18n = useI18n()
 const onCloseTab = (tabIndex) => {
-    tabStore.removeTab(tabIndex)
-    console.log('TODO: close connection also')
+    dialog.warning({
+        title: i18n.t('close_confirm_title'),
+        content: i18n.t('close_confirm'),
+        positiveText: i18n.t('confirm'),
+        negativeText: i18n.t('cancel'),
+        closable: false,
+        closeOnEsc: false,
+        maskClosable: false,
+        transformOrigin: 'center',
+        onPositiveClick: () => {
+            const removedTab = tabStore.removeTab(tabIndex)
+            if (removedTab != null) {
+                connectionStore.closeConnection(removedTab.name)
+            }
+        },
+    })
 }
 </script>
 
@@ -63,8 +83,7 @@ const onCloseTab = (tabIndex) => {
         <!--    <content-tab :model-value="tab"></content-tab>-->
         <n-tabs
             v-model:value="tabStore.activatedIndex"
-            :closable="tab.length > 1"
-            addable
+            :closable="true"
             size="small"
             type="card"
             @add="onAddTab"
@@ -75,10 +94,10 @@ const onCloseTab = (tabIndex) => {
                 <n-ellipsis style="max-width: 150px">{{ t.label }}</n-ellipsis>
             </n-tab>
         </n-tabs>
-        <!-- add loading status -->
+        <!-- TODO: add loading status -->
         <component
-            :is="valueComponents[tabContent.type]"
             v-if="tabContent != null && !isEmpty(tabContent.keyPath)"
+            :is="valueComponents[tabContent.type]"
             :db="tabContent.db"
             :key-path="tabContent.keyPath"
             :name="tabContent.name"
@@ -92,20 +111,5 @@ const onCloseTab = (tabIndex) => {
 </template>
 
 <style lang="scss" scoped>
-.content-container {
-    height: 100%;
-    overflow: hidden;
-    background-color: var(--bg-color);
-    padding-top: 2px;
-    padding-bottom: 5px;
-    box-sizing: border-box;
-}
-
-.empty-content {
-    height: 100%;
-    justify-content: center;
-}
-
-.tab-content {
-}
+@import 'content';
 </style>
diff --git a/frontend/src/components/content/ContentServerPane.vue b/frontend/src/components/content/ContentServerPane.vue
new file mode 100644
index 0000000..130381f
--- /dev/null
+++ b/frontend/src/components/content/ContentServerPane.vue
@@ -0,0 +1,43 @@
+<script setup>
+import useDialog from '../../stores/dialog.js'
+import AddLink from '../icons/AddLink.vue'
+
+const dialogStore = useDialog()
+</script>
+
+<template>
+    <div class="content-container flex-box-v">
+        <!-- TODO: replace icon to app icon -->
+        <n-empty :description="$t('empty_server_content')">
+            <template #extra>
+                <n-button @click="dialogStore.openNewDialog()">
+                    <template #icon>
+                        <n-icon :component="AddLink" size="18" />
+                    </template>
+                    {{ $t('new_conn') }}
+                </n-button>
+            </template>
+        </n-empty>
+    </div>
+</template>
+
+<style lang="scss" scoped>
+@import 'content';
+
+.content-container {
+    justify-content: center;
+}
+
+.color-preset-item {
+    width: 24px;
+    height: 24px;
+    margin-right: 2px;
+    border: white 3px solid;
+    cursor: pointer;
+
+    &_selected,
+    &:hover {
+        border-color: #cdd0d6;
+    }
+}
+</style>
diff --git a/frontend/src/components/ContentTab.vue b/frontend/src/components/content/ContentValueTab.vue
similarity index 92%
rename from frontend/src/components/ContentTab.vue
rename to frontend/src/components/content/ContentValueTab.vue
index 762fe1d..dbc69b0 100644
--- a/frontend/src/components/ContentTab.vue
+++ b/frontend/src/components/content/ContentValueTab.vue
@@ -1,9 +1,8 @@
 <script setup>
-import { ref, watch } from 'vue'
-import useConnectionStore from '../stores/connection.js'
-import { throttle } from 'lodash'
-import { ConnectionType } from '../consts/connection_type.js'
-import Close from './icons/Close.vue'
+import { ref } from 'vue'
+import { ConnectionType } from '../../consts/connection_type.js'
+import Close from '../icons/Close.vue'
+import useConnectionStore from '../../stores/connections.js'
 
 const emit = defineEmits(['switchTab', 'closeTab', 'update:modelValue'])
 
@@ -31,7 +30,7 @@ const onCurrentSelectChange = ({ type, group = '', server = '', db = 0, key = ''
         // load and update content value
     }
 }
-watch(() => connectionStore.currentSelect, throttle(onCurrentSelectChange, 1000))
+// watch(() => databaseStore.currentSelect, throttle(onCurrentSelectChange, 1000))
 
 const items = ref(props.modelValue)
 const selIndex = ref(props.selectedIndex)
diff --git a/frontend/src/components/content/content.scss b/frontend/src/components/content/content.scss
new file mode 100644
index 0000000..e2293fc
--- /dev/null
+++ b/frontend/src/components/content/content.scss
@@ -0,0 +1,16 @@
+.content-container {
+  height: 100%;
+  overflow: hidden;
+  background-color: var(--bg-color);
+  padding-top: 2px;
+  padding-bottom: 5px;
+  box-sizing: border-box;
+}
+
+.empty-content {
+  height: 100%;
+  justify-content: center;
+}
+
+.tab-content {
+}
diff --git a/frontend/src/components/content_value/ContentValueHash.vue b/frontend/src/components/content_value/ContentValueHash.vue
index 47908b3..905dfea 100644
--- a/frontend/src/components/content_value/ContentValueHash.vue
+++ b/frontend/src/components/content_value/ContentValueHash.vue
@@ -5,9 +5,9 @@ import ContentToolbar from '../ContentToolbar.vue'
 import AddLink from '../icons/AddLink.vue'
 import { NButton, NCode, NIcon, NInput, useMessage } from 'naive-ui'
 import { types, types as redisTypes } from '../../consts/support_redis_type.js'
-import EditableTableColumn from '../EditableTableColumn.vue'
-import useConnectionStore from '../../stores/connection.js'
+import EditableTableColumn from '../common/EditableTableColumn.vue'
 import useDialogStore from '../../stores/dialog.js'
+import useConnectionStore from '../../stores/connections.js'
 
 const i18n = useI18n()
 
diff --git a/frontend/src/components/content_value/ContentValueList.vue b/frontend/src/components/content_value/ContentValueList.vue
index 2e8f234..a71879c 100644
--- a/frontend/src/components/content_value/ContentValueList.vue
+++ b/frontend/src/components/content_value/ContentValueList.vue
@@ -6,9 +6,9 @@ import AddLink from '../icons/AddLink.vue'
 import { NButton, NCode, NIcon, NInput, useMessage } from 'naive-ui'
 import { size } from 'lodash'
 import { types, types as redisTypes } from '../../consts/support_redis_type.js'
-import EditableTableColumn from '../EditableTableColumn.vue'
-import useConnectionStore from '../../stores/connection.js'
+import EditableTableColumn from '../common/EditableTableColumn.vue'
 import useDialogStore from '../../stores/dialog.js'
+import useConnectionStore from '../../stores/connections.js'
 
 const i18n = useI18n()
 
diff --git a/frontend/src/components/content_value/ContentValueSet.vue b/frontend/src/components/content_value/ContentValueSet.vue
index a67c971..1856f5b 100644
--- a/frontend/src/components/content_value/ContentValueSet.vue
+++ b/frontend/src/components/content_value/ContentValueSet.vue
@@ -5,10 +5,10 @@ import ContentToolbar from '../ContentToolbar.vue'
 import AddLink from '../icons/AddLink.vue'
 import { NButton, NCode, NIcon, NInput, useMessage } from 'naive-ui'
 import { size } from 'lodash'
-import useConnectionStore from '../../stores/connection.js'
 import useDialogStore from '../../stores/dialog.js'
 import { types, types as redisTypes } from '../../consts/support_redis_type.js'
-import EditableTableColumn from '../EditableTableColumn.vue'
+import EditableTableColumn from '../common/EditableTableColumn.vue'
+import useConnectionStore from '../../stores/connections.js'
 
 const i18n = useI18n()
 const props = defineProps({
diff --git a/frontend/src/components/content_value/ContentValueString.vue b/frontend/src/components/content_value/ContentValueString.vue
index ced2f57..9f6e4ec 100644
--- a/frontend/src/components/content_value/ContentValueString.vue
+++ b/frontend/src/components/content_value/ContentValueString.vue
@@ -9,10 +9,10 @@ import { types } from '../../consts/value_view_type.js'
 import Close from '../icons/Close.vue'
 import Edit from '../icons/Edit.vue'
 import { IsJson } from '../../utils/check_string_format.js'
-import useConnectionStore from '../../stores/connection.js'
 import { types as redisTypes } from '../../consts/support_redis_type.js'
 import { ClipboardSetText } from '../../../wailsjs/runtime/runtime.js'
 import { toLower } from 'lodash'
+import useConnectionStore from '../../stores/connections.js'
 
 const props = defineProps({
     name: String,
diff --git a/frontend/src/components/content_value/ContentValueZSet.vue b/frontend/src/components/content_value/ContentValueZSet.vue
index 1fba3cc..2195638 100644
--- a/frontend/src/components/content_value/ContentValueZSet.vue
+++ b/frontend/src/components/content_value/ContentValueZSet.vue
@@ -5,10 +5,10 @@ import ContentToolbar from '../ContentToolbar.vue'
 import AddLink from '../icons/AddLink.vue'
 import { NButton, NCode, NIcon, NInput, NInputNumber, useMessage } from 'naive-ui'
 import { types, types as redisTypes } from '../../consts/support_redis_type.js'
-import EditableTableColumn from '../EditableTableColumn.vue'
-import useConnectionStore from '../../stores/connection.js'
+import EditableTableColumn from '../common/EditableTableColumn.vue'
 import { isEmpty } from 'lodash'
 import useDialogStore from '../../stores/dialog.js'
+import useConnectionStore from '../../stores/connections.js'
 
 const i18n = useI18n()
 const props = defineProps({
diff --git a/frontend/src/components/dialogs/AddFieldsDialog.vue b/frontend/src/components/dialogs/AddFieldsDialog.vue
index 964b706..547484f 100644
--- a/frontend/src/components/dialogs/AddFieldsDialog.vue
+++ b/frontend/src/components/dialogs/AddFieldsDialog.vue
@@ -4,12 +4,12 @@ import { types } from '../../consts/support_redis_type'
 import useDialog from '../../stores/dialog'
 import NewStringValue from '../new_value/NewStringValue.vue'
 import NewSetValue from '../new_value/NewSetValue.vue'
-import useConnectionStore from '../../stores/connection.js'
 import { useI18n } from 'vue-i18n'
 import { useMessage } from 'naive-ui'
 import AddListValue from '../new_value/AddListValue.vue'
 import AddHashValue from '../new_value/AddHashValue.vue'
 import AddZSetValue from '../new_value/AddZSetValue.vue'
+import useConnectionStore from '../../stores/connections.js'
 
 const i18n = useI18n()
 const newForm = reactive({
diff --git a/frontend/src/components/dialogs/NewKeyDialog.vue b/frontend/src/components/dialogs/NewKeyDialog.vue
index 6f5b0b8..4fcea2f 100644
--- a/frontend/src/components/dialogs/NewKeyDialog.vue
+++ b/frontend/src/components/dialogs/NewKeyDialog.vue
@@ -8,8 +8,8 @@ import NewHashValue from '../new_value/NewHashValue.vue'
 import NewListValue from '../new_value/NewListValue.vue'
 import NewZSetValue from '../new_value/NewZSetValue.vue'
 import NewSetValue from '../new_value/NewSetValue.vue'
-import useConnectionStore from '../../stores/connection.js'
 import { useI18n } from 'vue-i18n'
+import useConnectionStore from '../../stores/connections.js'
 
 const i18n = useI18n()
 const newForm = reactive({
diff --git a/frontend/src/components/dialogs/RenameKeyDialog.vue b/frontend/src/components/dialogs/RenameKeyDialog.vue
index 7972088..efcbb3e 100644
--- a/frontend/src/components/dialogs/RenameKeyDialog.vue
+++ b/frontend/src/components/dialogs/RenameKeyDialog.vue
@@ -1,9 +1,9 @@
 <script setup>
 import { reactive, watch } from 'vue'
 import useDialog from '../../stores/dialog'
-import useConnectionStore from '../../stores/connection.js'
 import { useMessage } from 'naive-ui'
 import { useI18n } from 'vue-i18n'
+import useConnectionStore from '../../stores/connections.js'
 
 const renameForm = reactive({
     server: '',
diff --git a/frontend/src/components/dialogs/SetTtlDialog.vue b/frontend/src/components/dialogs/SetTtlDialog.vue
index b5018aa..0474128 100644
--- a/frontend/src/components/dialogs/SetTtlDialog.vue
+++ b/frontend/src/components/dialogs/SetTtlDialog.vue
@@ -2,8 +2,8 @@
 import { reactive, ref, watch } from 'vue'
 import useDialog from '../../stores/dialog'
 import useTabStore from '../../stores/tab.js'
-import useConnectionStore from '../../stores/connection.js'
 import { useMessage } from 'naive-ui'
+import useConnectionStore from '../../stores/connections.js'
 
 const ttlForm = reactive({
     ttl: -1,
diff --git a/frontend/src/components/icons/Log.vue b/frontend/src/components/icons/Log.vue
new file mode 100644
index 0000000..3fb3b37
--- /dev/null
+++ b/frontend/src/components/icons/Log.vue
@@ -0,0 +1,46 @@
+<script setup>
+const props = defineProps({
+    strokeWidth: {
+        type: [Number, String],
+        default: 3,
+    },
+})
+</script>
+
+<template>
+    <svg fill="none" viewBox="0 0 48 48" xmlns="http://www.w3.org/2000/svg">
+        <rect
+            :stroke-width="strokeWidth"
+            fill="none"
+            height="34"
+            stroke="currentColor"
+            stroke-linejoin="round"
+            width="28"
+            x="13"
+            y="10"
+        />
+        <path
+            :stroke-width="strokeWidth"
+            d="M35 10V4H8C7.44772 4 7 4.44772 7 5V38H13"
+            stroke="currentColor"
+            stroke-linecap="round"
+            stroke-linejoin="round"
+        />
+        <path
+            :stroke-width="strokeWidth"
+            d="M21 22H33"
+            stroke="currentColor"
+            stroke-linecap="round"
+            stroke-linejoin="round"
+        />
+        <path
+            :stroke-width="strokeWidth"
+            d="M21 30H33"
+            stroke="currentColor"
+            stroke-linecap="round"
+            stroke-linejoin="round"
+        />
+    </svg>
+</template>
+
+<style lang="scss" scoped></style>
diff --git a/frontend/src/components/new_value/AddHashValue.vue b/frontend/src/components/new_value/AddHashValue.vue
index ac7134a..84f99bc 100644
--- a/frontend/src/components/new_value/AddHashValue.vue
+++ b/frontend/src/components/new_value/AddHashValue.vue
@@ -3,7 +3,7 @@ import { ref } from 'vue'
 import { flatMap, reject } from 'lodash'
 import Add from '../icons/Add.vue'
 import Delete from '../icons/Delete.vue'
-import IconButton from '../IconButton.vue'
+import IconButton from '../common/IconButton.vue'
 import { useI18n } from 'vue-i18n'
 
 const props = defineProps({
diff --git a/frontend/src/components/new_value/AddListValue.vue b/frontend/src/components/new_value/AddListValue.vue
index ee81741..0043a0f 100644
--- a/frontend/src/components/new_value/AddListValue.vue
+++ b/frontend/src/components/new_value/AddListValue.vue
@@ -3,7 +3,7 @@ import { ref } from 'vue'
 import { compact } from 'lodash'
 import Add from '../icons/Add.vue'
 import Delete from '../icons/Delete.vue'
-import IconButton from '../IconButton.vue'
+import IconButton from '../common/IconButton.vue'
 import { useI18n } from 'vue-i18n'
 
 const props = defineProps({
diff --git a/frontend/src/components/new_value/AddZSetValue.vue b/frontend/src/components/new_value/AddZSetValue.vue
index 381e08c..5d84aaf 100644
--- a/frontend/src/components/new_value/AddZSetValue.vue
+++ b/frontend/src/components/new_value/AddZSetValue.vue
@@ -3,7 +3,7 @@ import { ref } from 'vue'
 import { isEmpty, reject } from 'lodash'
 import Add from '../icons/Add.vue'
 import Delete from '../icons/Delete.vue'
-import IconButton from '../IconButton.vue'
+import IconButton from '../common/IconButton.vue'
 import { useI18n } from 'vue-i18n'
 
 const props = defineProps({
diff --git a/frontend/src/components/new_value/NewHashValue.vue b/frontend/src/components/new_value/NewHashValue.vue
index a21dd64..cfbd46b 100644
--- a/frontend/src/components/new_value/NewHashValue.vue
+++ b/frontend/src/components/new_value/NewHashValue.vue
@@ -3,7 +3,7 @@ import { ref } from 'vue'
 import { flatMap, reject } from 'lodash'
 import Add from '../icons/Add.vue'
 import Delete from '../icons/Delete.vue'
-import IconButton from '../IconButton.vue'
+import IconButton from '../common/IconButton.vue'
 
 const props = defineProps({
     value: Array,
diff --git a/frontend/src/components/new_value/NewListValue.vue b/frontend/src/components/new_value/NewListValue.vue
index d0657c7..ecbff64 100644
--- a/frontend/src/components/new_value/NewListValue.vue
+++ b/frontend/src/components/new_value/NewListValue.vue
@@ -3,7 +3,7 @@ import { ref } from 'vue'
 import { compact } from 'lodash'
 import Add from '../icons/Add.vue'
 import Delete from '../icons/Delete.vue'
-import IconButton from '../IconButton.vue'
+import IconButton from '../common/IconButton.vue'
 
 const props = defineProps({
     value: Array,
diff --git a/frontend/src/components/new_value/NewSetValue.vue b/frontend/src/components/new_value/NewSetValue.vue
index 4a32a77..279be41 100644
--- a/frontend/src/components/new_value/NewSetValue.vue
+++ b/frontend/src/components/new_value/NewSetValue.vue
@@ -3,7 +3,7 @@ import { ref } from 'vue'
 import { compact, uniq } from 'lodash'
 import Add from '../icons/Add.vue'
 import Delete from '../icons/Delete.vue'
-import IconButton from '../IconButton.vue'
+import IconButton from '../common/IconButton.vue'
 
 const props = defineProps({
     value: Array,
diff --git a/frontend/src/components/new_value/NewZSetValue.vue b/frontend/src/components/new_value/NewZSetValue.vue
index 7280d22..f45a62e 100644
--- a/frontend/src/components/new_value/NewZSetValue.vue
+++ b/frontend/src/components/new_value/NewZSetValue.vue
@@ -3,7 +3,7 @@ import { ref } from 'vue'
 import { flatMap, isEmpty, reject } from 'lodash'
 import Add from '../icons/Add.vue'
 import Delete from '../icons/Delete.vue'
-import IconButton from '../IconButton.vue'
+import IconButton from '../common/IconButton.vue'
 
 const props = defineProps({
     value: Array,
diff --git a/frontend/src/components/NavigationPane.vue b/frontend/src/components/sidebar/ConnectionPane.vue
similarity index 78%
rename from frontend/src/components/NavigationPane.vue
rename to frontend/src/components/sidebar/ConnectionPane.vue
index b27adb2..5c61d08 100644
--- a/frontend/src/components/NavigationPane.vue
+++ b/frontend/src/components/sidebar/ConnectionPane.vue
@@ -1,12 +1,12 @@
 <script setup>
-import useDialogStore from '../stores/dialog.js'
+import useDialogStore from '../../stores/dialog.js'
 import { NIcon } from 'naive-ui'
-import AddGroup from './icons/AddGroup.vue'
-import AddLink from './icons/AddLink.vue'
-import Sort from './icons/Sort.vue'
-import ConnectionsTree from './ConnectionsTree.vue'
-import IconButton from './IconButton.vue'
-import Filter from './icons/Filter.vue'
+import AddGroup from '../icons/AddGroup.vue'
+import AddLink from '../icons/AddLink.vue'
+import Sort from '../icons/Sort.vue'
+import IconButton from '../common/IconButton.vue'
+import Filter from '../icons/Filter.vue'
+import ConnectionTree from './ConnectionTree.vue'
 
 const dialogStore = useDialogStore()
 
@@ -16,8 +16,8 @@ const onSort = () => {
 </script>
 
 <template>
-    <div v-if="true" class="nav-pane-container flex-box-v">
-        <ConnectionsTree />
+    <div class="nav-pane-container flex-box-v">
+        <connection-tree />
 
         <!-- bottom function bar -->
         <div class="nav-pane-bottom flex-box-h">
diff --git a/frontend/src/components/sidebar/ConnectionTree.vue b/frontend/src/components/sidebar/ConnectionTree.vue
new file mode 100644
index 0000000..f040b69
--- /dev/null
+++ b/frontend/src/components/sidebar/ConnectionTree.vue
@@ -0,0 +1,271 @@
+<script setup>
+import useDialogStore from '../../stores/dialog.js'
+import { h, nextTick, onMounted, reactive, ref } from 'vue'
+import useConnectionStore from '../../stores/connections.js'
+import { NIcon, useMessage } from 'naive-ui'
+import { ConnectionType } from '../../consts/connection_type.js'
+import ToggleFolder from '../icons/ToggleFolder.vue'
+import ToggleServer from '../icons/ToggleServer.vue'
+import { indexOf } from 'lodash'
+import Config from '../icons/Config.vue'
+import Delete from '../icons/Delete.vue'
+import Refresh from '../icons/Refresh.vue'
+import Unlink from '../icons/Unlink.vue'
+import CopyLink from '../icons/CopyLink.vue'
+import Connect from '../icons/Connect.vue'
+import { useI18n } from 'vue-i18n'
+import useTabStore from '../../stores/tab.js'
+import Edit from '../icons/Edit.vue'
+
+const i18n = useI18n()
+const loadingConnection = ref(false)
+const openingConnection = ref(false)
+const connectionStore = useConnectionStore()
+const tabStore = useTabStore()
+const dialogStore = useDialogStore()
+const message = useMessage()
+
+const expandedKeys = ref([])
+
+onMounted(async () => {
+    try {
+        loadingConnection.value = true
+        await nextTick()
+        await connectionStore.initConnections()
+    } finally {
+        loadingConnection.value = false
+    }
+})
+
+const contextMenuParam = reactive({
+    show: false,
+    x: 0,
+    y: 0,
+    options: null,
+    currentNode: null,
+})
+
+const renderIcon = (icon) => {
+    return () => {
+        return h(NIcon, null, {
+            default: () => h(icon),
+        })
+    }
+}
+const menuOptions = {
+    [ConnectionType.Group]: ({ opened }) => [
+        {
+            key: 'group_reload',
+            label: i18n.t('edit_conn_group'),
+            icon: renderIcon(Config),
+        },
+        {
+            key: 'group_delete',
+            label: i18n.t('remove_conn_group'),
+            icon: renderIcon(Delete),
+        },
+    ],
+    [ConnectionType.Server]: ({ connected }) => {
+        if (connected) {
+            return [
+                {
+                    key: 'server_reload',
+                    label: i18n.t('reload'),
+                    icon: renderIcon(Refresh),
+                },
+                {
+                    key: 'server_close',
+                    label: i18n.t('disconnect'),
+                    icon: renderIcon(Unlink),
+                },
+                {
+                    key: 'server_dup',
+                    label: i18n.t('dup_conn'),
+                    icon: renderIcon(CopyLink),
+                },
+                {
+                    key: 'server_config',
+                    label: i18n.t('edit_conn'),
+                    icon: renderIcon(Config),
+                },
+                {
+                    type: 'divider',
+                    key: 'd1',
+                },
+                {
+                    key: 'server_remove',
+                    label: i18n.t('remove_conn'),
+                    icon: renderIcon(Delete),
+                },
+            ]
+        } else {
+            return [
+                {
+                    key: 'server_open',
+                    label: i18n.t('open_connection'),
+                    icon: renderIcon(Connect),
+                },
+                {
+                    key: 'server_edit',
+                    label: i18n.t('edit_conn'),
+                    icon: renderIcon(Edit),
+                },
+                {
+                    type: 'divider',
+                    key: 'd1',
+                },
+                {
+                    key: 'server_delete',
+                    label: i18n.t('remove_conn'),
+                    icon: renderIcon(Delete),
+                },
+            ]
+        }
+    },
+}
+
+const renderLabel = ({ option }) => {
+    // switch (option.type) {
+    //     case ConnectionType.Server:
+    //         return h(ConnectionTreeItem, { title: option.label })
+    // }
+    return option.label
+}
+
+const renderPrefix = ({ option }) => {
+    switch (option.type) {
+        case ConnectionType.Group:
+            const opened = indexOf(expandedKeys.value, option.key) !== -1
+            return h(
+                NIcon,
+                { size: 20 },
+                {
+                    default: () => h(ToggleFolder, { modelValue: opened }),
+                }
+            )
+        case ConnectionType.Server:
+            const connected = connectionStore.isConnected(option.name)
+            return h(
+                NIcon,
+                { size: 20 },
+                {
+                    default: () => h(ToggleServer, { modelValue: !!connected }),
+                }
+            )
+    }
+}
+
+const onUpdateExpandedKeys = (value, option, meta) => {
+    expandedKeys.value = value
+}
+
+/**
+ * Open connection
+ * @param name
+ * @returns {Promise<void>}
+ */
+const openConnection = async (name) => {
+    try {
+        openingConnection.value = true
+        await connectionStore.openConnection(name)
+        tabStore.upsertTab({
+            server: name,
+        })
+    } catch (e) {
+        message.error(e.message)
+        // node.isLeaf = undefined
+    } finally {
+        openingConnection.value = false
+    }
+}
+
+const nodeProps = ({ option }) => {
+    return {
+        onDblclick: async () => {
+            if (option.type === ConnectionType.Server) {
+                openConnection(option.name).then(() => {})
+            }
+        },
+        onContextmenu(e) {
+            e.preventDefault()
+            const mop = menuOptions[option.type]
+            if (mop == null) {
+                return
+            }
+            contextMenuParam.show = false
+            nextTick().then(() => {
+                contextMenuParam.options = mop(option)
+                contextMenuParam.currentNode = option
+                contextMenuParam.x = e.clientX
+                contextMenuParam.y = e.clientY
+                contextMenuParam.show = true
+            })
+        },
+    }
+}
+
+const renderContextLabel = (option) => {
+    return h('div', { class: 'context-menu-item' }, option.label)
+}
+
+const handleSelectContextMenu = (key) => {
+    contextMenuParam.show = false
+    const { name, db, key: nodeKey, redisKey } = contextMenuParam.currentNode
+    switch (key) {
+        case 'server_open':
+            openConnection(name).then(() => {})
+    }
+    console.warn('TODO: handle context menu:' + key)
+}
+</script>
+
+<template>
+    <n-tree
+        :animated="false"
+        :block-line="true"
+        :block-node="true"
+        :cancelable="false"
+        :data="connectionStore.connections"
+        :expand-on-click="true"
+        :expanded-keys="expandedKeys"
+        :node-props="nodeProps"
+        :on-update:expanded-keys="onUpdateExpandedKeys"
+        :render-label="renderLabel"
+        :render-prefix="renderPrefix"
+        class="fill-height"
+        virtual-scroll
+    />
+
+    <!-- status display modal -->
+    <n-modal :show="loadingConnection || openingConnection" transform-origin="center">
+        <n-card
+            :bordered="false"
+            :content-style="{ textAlign: 'center' }"
+            aria-model="true"
+            role="dialog"
+            style="width: 400px"
+        >
+            <n-spin>
+                <template #description>
+                    {{ openingConnection ? $t('opening_connection') : '' }}
+                </template>
+            </n-spin>
+        </n-card>
+    </n-modal>
+
+    <!-- context menu -->
+    <n-dropdown
+        :animated="false"
+        :options="contextMenuParam.options"
+        :render-label="renderContextLabel"
+        :show="contextMenuParam.show"
+        :x="contextMenuParam.x"
+        :y="contextMenuParam.y"
+        placement="bottom-start"
+        trigger="manual"
+        @clickoutside="contextMenuParam.show = false"
+        @select="handleSelectContextMenu"
+    />
+</template>
+
+<style lang="scss" scoped></style>
diff --git a/frontend/src/components/sidebar/ConnectionTreeItem.vue b/frontend/src/components/sidebar/ConnectionTreeItem.vue
new file mode 100644
index 0000000..f560219
--- /dev/null
+++ b/frontend/src/components/sidebar/ConnectionTreeItem.vue
@@ -0,0 +1,26 @@
+<script setup>
+const props = defineProps({
+    title: String,
+})
+</script>
+
+<template>
+    <div class="db-tree-item flex-box-v">
+        <div class="tree-item-title">{{ title }}</div>
+        <div class="tree-item-addr">localhost:3306</div>
+    </div>
+</template>
+
+<style lang="scss">
+.db-tree-item {
+    padding: 0 5px;
+
+    .tree-item-title {
+        font-size: 16px;
+    }
+
+    .tree-item-addr {
+        font-size: 12px;
+    }
+}
+</style>
diff --git a/frontend/src/components/sidebar/DatabasePane.vue b/frontend/src/components/sidebar/DatabasePane.vue
new file mode 100644
index 0000000..047753e
--- /dev/null
+++ b/frontend/src/components/sidebar/DatabasePane.vue
@@ -0,0 +1,44 @@
+<script setup>
+import { NIcon } from 'naive-ui'
+import AddGroup from '../icons/AddGroup.vue'
+import AddLink from '../icons/AddLink.vue'
+import DatabaseTree from './DatabaseTree.vue'
+import IconButton from '../common/IconButton.vue'
+import Filter from '../icons/Filter.vue'
+import useTabStore from '../../stores/tab.js'
+import { computed } from 'vue'
+import { get } from 'lodash'
+
+const tabStore = useTabStore()
+const currentName = computed(() => get(tabStore.currentTab, 'name', ''))
+</script>
+
+<template>
+    <div class="nav-pane-container flex-box-v">
+        <database-tree :server="currentName" />
+
+        <!-- bottom function bar -->
+        <div class="nav-pane-bottom flex-box-h">
+            <icon-button :icon="AddLink" color="#555" size="20" stroke-width="4" t-tooltip="new_conn" />
+            <icon-button :icon="AddGroup" color="#555" size="20" stroke-width="4" t-tooltip="new_group" />
+            <n-input placeholder="">
+                <template #prefix>
+                    <n-icon :component="Filter" color="#aaa" size="20" />
+                </template>
+            </n-input>
+        </div>
+    </div>
+</template>
+
+<style lang="scss" scoped>
+.nav-pane-container {
+    overflow: hidden;
+    background-color: var(--bg-color);
+
+    .nav-pane-bottom {
+        align-items: center;
+        gap: 5px;
+        padding: 3px 3px 5px 5px;
+    }
+}
+</style>
diff --git a/frontend/src/components/ConnectionsTree.vue b/frontend/src/components/sidebar/DatabaseTree.vue
similarity index 68%
rename from frontend/src/components/ConnectionsTree.vue
rename to frontend/src/components/sidebar/DatabaseTree.vue
index 6c79f2d..cfefc4b 100644
--- a/frontend/src/components/ConnectionsTree.vue
+++ b/frontend/src/components/sidebar/DatabaseTree.vue
@@ -1,38 +1,37 @@
 <script setup>
 import { h, nextTick, onMounted, reactive, ref } from 'vue'
-import { ConnectionType } from '../consts/connection_type.js'
-import useConnection from '../stores/connection.js'
+import { ConnectionType } from '../../consts/connection_type.js'
 import { NIcon, useDialog, useMessage } from 'naive-ui'
-import ToggleFolder from './icons/ToggleFolder.vue'
-import Key from './icons/Key.vue'
-import ToggleDb from './icons/ToggleDb.vue'
-import ToggleServer from './icons/ToggleServer.vue'
+import Key from '../icons/Key.vue'
+import ToggleDb from '../icons/ToggleDb.vue'
 import { indexOf, remove, startsWith } from 'lodash'
 import { useI18n } from 'vue-i18n'
-import Refresh from './icons/Refresh.vue'
-import Config from './icons/Config.vue'
-import CopyLink from './icons/CopyLink.vue'
-import Unlink from './icons/Unlink.vue'
-import Add from './icons/Add.vue'
-import Layer from './icons/Layer.vue'
-import Delete from './icons/Delete.vue'
-import Connect from './icons/Connect.vue'
-import useDialogStore from '../stores/dialog.js'
-import { ClipboardSetText } from '../../wailsjs/runtime/runtime.js'
-import useTabStore from '../stores/tab.js'
+import Refresh from '../icons/Refresh.vue'
+import CopyLink from '../icons/CopyLink.vue'
+import Add from '../icons/Add.vue'
+import Layer from '../icons/Layer.vue'
+import Delete from '../icons/Delete.vue'
+import Connect from '../icons/Connect.vue'
+import useDialogStore from '../../stores/dialog.js'
+import { ClipboardSetText } from '../../../wailsjs/runtime/runtime.js'
+import useTabStore from '../../stores/tab.js'
+import useConnectionStore from '../../stores/connections.js'
 
 const i18n = useI18n()
 const loading = ref(false)
 const loadingConnections = ref(false)
 const expandedKeys = ref([])
-const connectionStore = useConnection()
+const connectionStore = useConnectionStore()
 const tabStore = useTabStore()
 const dialogStore = useDialogStore()
 
-const showContextMenu = ref(false)
-const contextPos = reactive({ x: 0, y: 0 })
-const contextMenuOptions = ref(null)
-const currentContextNode = ref(null)
+const contextMenuParam = reactive({
+    show: false,
+    x: 0,
+    y: 0,
+    options: null,
+    currentNode: null,
+})
 const renderIcon = (icon) => {
     return () => {
         return h(NIcon, null, {
@@ -41,61 +40,6 @@ const renderIcon = (icon) => {
     }
 }
 const menuOptions = {
-    [ConnectionType.Group]: ({ opened }) => [
-        {
-            key: 'group_reload',
-            label: i18n.t('config_conn_group'),
-            icon: renderIcon(Config),
-        },
-        {
-            key: 'group_delete',
-            label: i18n.t('remove_conn_group'),
-            icon: renderIcon(Delete),
-        },
-    ],
-    [ConnectionType.Server]: ({ connected }) => {
-        if (connected) {
-            return [
-                {
-                    key: 'server_reload',
-                    label: i18n.t('reload'),
-                    icon: renderIcon(Refresh),
-                },
-                {
-                    key: 'server_disconnect',
-                    label: i18n.t('disconnect'),
-                    icon: renderIcon(Unlink),
-                },
-                {
-                    key: 'server_dup',
-                    label: i18n.t('dup_conn'),
-                    icon: renderIcon(CopyLink),
-                },
-                {
-                    key: 'server_config',
-                    label: i18n.t('config_conn'),
-                    icon: renderIcon(Config),
-                },
-                {
-                    type: 'divider',
-                    key: 'd1',
-                },
-                {
-                    key: 'server_remove',
-                    label: i18n.t('remove_conn'),
-                    icon: renderIcon(Delete),
-                },
-            ]
-        } else {
-            return [
-                {
-                    key: 'server_open',
-                    label: i18n.t('open_connection'),
-                    icon: renderIcon(Connect),
-                },
-            ]
-        }
-    },
     [ConnectionType.RedisDB]: ({ opened }) => {
         if (opened) {
             return [
@@ -177,12 +121,16 @@ onMounted(async () => {
     try {
         // TODO: Show loading list status
         loadingConnections.value = true
-        nextTick(connectionStore.initConnection)
+        // nextTick(connectionStore.initConnection)
     } finally {
         loadingConnections.value = false
     }
 })
 
+const props = defineProps({
+    server: Strig,
+})
+
 const expandKey = (key) => {
     const idx = indexOf(expandedKeys.value, key)
     if (idx === -1) {
@@ -224,22 +172,6 @@ const onUpdateExpanded = (value, option, meta) => {
 
 const renderPrefix = ({ option }) => {
     switch (option.type) {
-        case ConnectionType.Group:
-            return h(
-                NIcon,
-                { size: 20 },
-                {
-                    default: () => h(ToggleFolder, { modelValue: option.expanded === true }),
-                }
-            )
-        case ConnectionType.Server:
-            return h(
-                NIcon,
-                { size: 20 },
-                {
-                    default: () => h(ToggleServer, { modelValue: option.connected === true }),
-                }
-            )
         case ConnectionType.RedisDB:
             return h(
                 NIcon,
@@ -302,6 +234,7 @@ const nodeProps = ({ option }) => {
 
                 case ConnectionType.RedisDB:
                     option.isLeaf = false
+                    break
             }
 
             // default handle is expand current node
@@ -313,13 +246,13 @@ const nodeProps = ({ option }) => {
             if (mop == null) {
                 return
             }
-            showContextMenu.value = false
+            contextMenuParam.show = false
             nextTick().then(() => {
-                contextMenuOptions.value = mop(option)
-                currentContextNode.value = option
-                contextPos.x = e.clientX
-                contextPos.y = e.clientY
-                showContextMenu.value = true
+                contextMenuParam.options = mop(option)
+                contextMenuParam.currentNode = option
+                contextMenuParam.x = e.clientX
+                contextMenuParam.y = e.clientY
+                contextMenuParam.show = true
             })
         },
         // onMouseover() {
@@ -330,17 +263,6 @@ const nodeProps = ({ option }) => {
 
 const onLoadTree = async (node) => {
     switch (node.type) {
-        case ConnectionType.Server:
-            loading.value = true
-            try {
-                await connectionStore.openConnection(node.name)
-            } catch (e) {
-                message.error(e.message)
-                node.isLeaf = undefined
-            } finally {
-                loading.value = false
-            }
-            break
         case ConnectionType.RedisDB:
             loading.value = true
             try {
@@ -356,8 +278,8 @@ const onLoadTree = async (node) => {
 }
 
 const handleSelectContextMenu = (key) => {
-    showContextMenu.value = false
-    const { name, db, key: nodeKey, redisKey } = currentContextNode.value
+    contextMenuParam.show = false
+    const { name, db, key: nodeKey, redisKey } = contextMenuParam.currentNode
     switch (key) {
         case 'server_disconnect':
             connectionStore.closeConnection(nodeKey).then((success) => {
@@ -412,7 +334,7 @@ const handleSelectContextMenu = (key) => {
 }
 
 const handleOutsideContextMenu = () => {
-    showContextMenu.value = false
+    contextMenuParam.show = false
 }
 </script>
 
@@ -420,7 +342,9 @@ const handleOutsideContextMenu = () => {
     <n-tree
         :block-line="true"
         :block-node="true"
-        :data="connectionStore.connections"
+        :animated="false"
+        :cancelable="false"
+        :data="connectionStore.databases[props.server] || []"
         :expand-on-click="false"
         :expanded-keys="expandedKeys"
         :node-props="nodeProps"
@@ -429,17 +353,16 @@ const handleOutsideContextMenu = () => {
         :render-label="renderLabel"
         :render-prefix="renderPrefix"
         :render-suffix="renderSuffix"
-        block-line
         class="fill-height"
         virtual-scroll
     />
     <n-dropdown
         :animated="false"
-        :options="contextMenuOptions"
+        :options="contextMenuParam.options"
         :render-label="renderContextLabel"
-        :show="showContextMenu"
-        :x="contextPos.x"
-        :y="contextPos.y"
+        :show="contextMenuParam.show"
+        :x="contextMenuParam.x"
+        :y="contextMenuParam.y"
         placement="bottom-start"
         trigger="manual"
         @clickoutside="handleOutsideContextMenu"
diff --git a/frontend/src/langs/en.json b/frontend/src/langs/en.json
index d471aad..062f93a 100644
--- a/frontend/src/langs/en.json
+++ b/frontend/src/langs/en.json
@@ -9,6 +9,9 @@
   "new_group": "Add New Group",
   "sort_conn": "Resort Connections",
   "reload_key": "Reload Current Key",
+  "close_confirm_title": "Confirm Close",
+  "close_confirm": "Confirm close this tab and connection",
+  "opening_connection": "Opening Connection...",
   "ttl": "TTL",
   "forever": "Forever",
   "rename_key": "Rename Key",
@@ -31,8 +34,8 @@
   "disconnect": "Disconnect",
   "dup_conn": "Duplicate Connection",
   "remove_conn": "Delete Connection",
-  "config_conn": "Edit Connection Config",
-  "config_conn_group": "Edit Connection Group",
+  "edit_conn": "Edit Connection Config",
+  "edit_conn_group": "Edit Connection Group",
   "remove_conn_group": "Delete Connection Group",
   "copy_path": "Copy Path",
   "remove_path": "Remove Path",
@@ -102,10 +105,12 @@
   "field_required": "This item should not be blank",
   "spec_field_required": "\"{key}\" should not be blank",
   "no_connections": "No Connection",
-  "empty_tab_content": "Select the key from left list to see the details of the key.",
+  "empty_tab_content": "Select the key from left list to see detail.",
+  "empty_server_content": "Connect server from left list",
   "reload_when_succ": "Reload immediately after success",
   "server": "Server",
   "structure": "Structure",
+  "log": "Log",
   "about": "About",
   "check_update": "Check for Updates..."
 }
diff --git a/frontend/src/langs/zh-cn.json b/frontend/src/langs/zh-cn.json
index a546fb0..65ae597 100644
--- a/frontend/src/langs/zh-cn.json
+++ b/frontend/src/langs/zh-cn.json
@@ -9,6 +9,9 @@
   "new_group": "添加新分组",
   "sort_conn": "调整连接顺序",
   "reload_key": "重新载入此键内容",
+  "close_confirm_title": "关闭确认",
+  "close_confirm": "是否关闭当前连接",
+  "opening_connection": "正在打开连接...",
   "ttl": "TTL",
   "forever": "永久",
   "rename_key": "重命名键",
@@ -33,8 +36,8 @@
   "disconnect": "断开连接",
   "dup_conn": "复制连接",
   "remove_conn": "删除连接",
-  "config_conn": "编辑连接配置",
-  "config_conn_group": "编辑连接分组",
+  "edit_conn": "编辑连接配置",
+  "edit_conn_group": "编辑连接分组",
   "remove_conn_group": "删除连接分组",
   "copy_path": "复制路径",
   "remove_path": "删除路径",
@@ -106,9 +109,11 @@
   "spec_field_required": "{key} 不能为空",
   "no_connections": "空空如也",
   "empty_tab_content": "可以从左边选择键来查看键的详细内容",
+  "empty_server_content": "可以从左边选择并打开连接",
   "reload_when_succ": "操作成功后立即重新加载",
   "server": "服务器",
   "structure": "结构",
+  "log": "日志",
   "about": "关于",
   "check_update": "检查更新..."
 }
diff --git a/frontend/src/stores/connections.js b/frontend/src/stores/connections.js
new file mode 100644
index 0000000..9550616
--- /dev/null
+++ b/frontend/src/stores/connections.js
@@ -0,0 +1,921 @@
+import { defineStore } from 'pinia'
+import { get, isEmpty, last, remove, size, sortedIndexBy, split } from 'lodash'
+import {
+    AddHashField,
+    AddListItem,
+    AddZSetValue,
+    CloseConnection,
+    GetKeyValue,
+    ListConnection,
+    OpenConnection,
+    OpenDatabase,
+    RemoveKey,
+    RenameKey,
+    SetHashValue,
+    SetKeyTTL,
+    SetKeyValue,
+    SetListItem,
+    SetSetItem,
+    UpdateSetItem,
+    UpdateZSetValue,
+} from '../../wailsjs/go/services/connectionService.js'
+import { ConnectionType } from '../consts/connection_type.js'
+import useTabStore from './tab.js'
+
+const separator = ':'
+
+const useConnectionStore = defineStore('connections', {
+    /**
+     * @typedef {Object} ConnectionItem
+     * @property {string} key
+     * @property {string} label display label
+     * @property {string} name database name
+     * @property {number} type
+     * @property {ConnectionItem[]} children
+     */
+
+    /**
+     * @typedef {Object} DatabaseItem
+     * @property {string} key
+     * @property {string} label
+     * @property {string} name - server name, type != ConnectionType.Group only
+     * @property {number} type
+     * @property {number} [db] - database index, type == ConnectionType.RedisDB only
+     * @property {number} keys
+     * @property {boolean} [opened] - redis db is opened, type == ConnectionType.RedisDB only
+     * @property {boolean} [expanded] - current node is expanded
+     */
+
+    /**
+     *
+     * @returns {{databases: Object<string, DatabaseItem[]>, connections: ConnectionItem[]}}
+     */
+    state: () => ({
+        connections: [], // all connections
+        databases: {}, // all databases in opened connections group by name
+    }),
+    getters: {
+        anyConnectionOpened() {
+            return !isEmpty(this.databases)
+        },
+    },
+    actions: {
+        /**
+         * Load all store connections struct from local profile
+         * @returns {Promise<void>}
+         */
+        async initConnections() {
+            if (!isEmpty(this.connections)) {
+                return
+            }
+            const conns = []
+            const { data = [{ groupName: '', connections: [] }] } = await ListConnection()
+            for (let i = 0; i < data.length; i++) {
+                const group = data[i]
+                // Top level group
+                if (isEmpty(group.groupName)) {
+                    const len = size(group.connections)
+                    for (let j = 0; j < len; j++) {
+                        const item = group.connections[j]
+                        conns.push({
+                            key: item.name,
+                            label: item.name,
+                            name: item.name,
+                            type: ConnectionType.Server,
+                            // isLeaf: false,
+                        })
+                    }
+                } else {
+                    // Custom group
+                    const children = []
+                    const len = size(group.connections)
+                    for (let j = 0; j < len; j++) {
+                        const item = group.connections[j]
+                        const value = group.groupName + '/' + item.name
+                        children.push({
+                            key: value,
+                            label: item.name,
+                            name: item.name,
+                            type: ConnectionType.Server,
+                            children: j === len - 1 ? undefined : [],
+                            // isLeaf: false,
+                        })
+                    }
+                    conns.push({
+                        key: group.groupName,
+                        label: group.groupName,
+                        type: ConnectionType.Group,
+                        children,
+                    })
+                }
+            }
+            this.connections = conns
+            console.debug(JSON.stringify(this.connections))
+        },
+
+        /**
+         * get database server by name
+         * @param name
+         * @returns {ConnectionItem|null}
+         */
+        getConnection(name) {
+            const conns = this.connections
+            for (let i = 0; i < conns.length; i++) {
+                if (conns[i].type === ConnectionType.Server && conns[i].key === name) {
+                    return conns[i]
+                } else if (conns[i].type === ConnectionType.Group) {
+                    const children = conns[i].children
+                    for (let j = 0; j < children.length; j++) {
+                        if (children[j].type === ConnectionType.Server && conns[i].key === name) {
+                            return children[j]
+                        }
+                    }
+                }
+            }
+            return null
+        },
+
+        /**
+         * Check if connection is connected
+         * @param name
+         * @returns {boolean}
+         */
+        isConnected(name) {
+            let dbs = get(this.databases, name, [])
+            return !isEmpty(dbs)
+        },
+
+        /**
+         * Open connection
+         * @param {string} name
+         * @returns {Promise<void>}
+         */
+        async openConnection(name) {
+            if (this.isConnected(name)) {
+                return
+            }
+
+            const { data, success, msg } = await OpenConnection(name)
+            if (!success) {
+                throw new Error(msg)
+            }
+            // append to db node to current connection
+            // const connNode = this.getConnection(name)
+            // if (connNode == null) {
+            //     throw new Error('no such connection')
+            // }
+            const { db } = data
+            if (isEmpty(db)) {
+                throw new Error('no db loaded')
+            }
+            const dbs = []
+            for (let i = 0; i < db.length; i++) {
+                dbs.push({
+                    key: `${name}/${db[i].name}`,
+                    label: db[i].name,
+                    name: name,
+                    keys: db[i].keys,
+                    db: i,
+                    type: ConnectionType.RedisDB,
+                    isLeaf: false,
+                })
+            }
+            this.databases[name] = dbs
+        },
+
+        /**
+         * Close connection
+         * @param {string} name
+         * @returns {Promise<boolean>}
+         */
+        async closeConnection(name) {
+            const { success, msg } = await CloseConnection(name)
+            if (!success) {
+                // throw new Error(msg)
+                return false
+            }
+
+            delete this.databases[name]
+            return true
+        },
+
+        /**
+         * Open database and load all keys
+         * @param connName
+         * @param db
+         * @returns {Promise<void>}
+         */
+        async openDatabase(connName, db) {
+            const { data, success, msg } = await OpenDatabase(connName, db)
+            if (!success) {
+                throw new Error(msg)
+            }
+            const { keys = [] } = data
+            if (isEmpty(keys)) {
+                const dbs = this.databases[connName]
+                dbs[db].children = []
+                dbs[db].opened = true
+                return
+            }
+
+            // insert child to children list by order
+            const sortedInsertChild = (childrenList, item) => {
+                const insertIdx = sortedIndexBy(childrenList, item, 'key')
+                childrenList.splice(insertIdx, 0, item)
+                // childrenList.push(item)
+            }
+            // update all node item's children num
+            const updateChildrenNum = (node) => {
+                let count = 0
+                const totalChildren = size(node.children)
+                if (totalChildren > 0) {
+                    for (const elem of node.children) {
+                        updateChildrenNum(elem)
+                        count += elem.keys
+                    }
+                } else {
+                    count += 1
+                }
+                node.keys = count
+                // node.children = sortBy(node.children, 'label')
+            }
+
+            const keyStruct = []
+            const mark = {}
+            for (const key in keys) {
+                const keyPart = split(key, separator)
+                // const prefixLen = size(keyPart) - 1
+                const len = size(keyPart)
+                let handlePath = ''
+                let ks = keyStruct
+                for (let i = 0; i < len; i++) {
+                    handlePath += keyPart[i]
+                    if (i !== len - 1) {
+                        // layer
+                        const treeKey = `${handlePath}@${ConnectionType.RedisKey}`
+                        if (!mark.hasOwnProperty(treeKey)) {
+                            mark[treeKey] = {
+                                key: `${connName}/db${db}/${treeKey}`,
+                                label: keyPart[i],
+                                name: connName,
+                                db,
+                                keys: 0,
+                                redisKey: handlePath,
+                                type: ConnectionType.RedisKey,
+                                children: [],
+                            }
+                            sortedInsertChild(ks, mark[treeKey])
+                        }
+                        ks = mark[treeKey].children
+                        handlePath += separator
+                    } else {
+                        // key
+                        const treeKey = `${handlePath}@${ConnectionType.RedisValue}`
+                        mark[treeKey] = {
+                            key: `${connName}/db${db}/${treeKey}`,
+                            label: keyPart[i],
+                            name: connName,
+                            db,
+                            keys: 0,
+                            redisKey: handlePath,
+                            type: ConnectionType.RedisValue,
+                        }
+                        sortedInsertChild(ks, mark[treeKey])
+                    }
+                }
+            }
+
+            // append db node to current connection's children
+            const dbs = this.databases[connName]
+            dbs[db].children = keyStruct
+            dbs[db].opened = true
+            updateChildrenNum(dbs[db])
+        },
+
+        /**
+         * select node
+         * @param key
+         * @param name
+         * @param db
+         * @param type
+         * @param redisKey
+         */
+        select({ key, name, db, type, redisKey }) {
+            if (type === ConnectionType.RedisValue) {
+                console.log(`[click]key:${key} db: ${db} redis key: ${redisKey}`)
+
+                // async get value for key
+                this.loadKeyValue(name, db, redisKey).then(() => {})
+            }
+        },
+
+        /**
+         * load redis key
+         * @param server
+         * @param db
+         * @param key
+         */
+        async loadKeyValue(server, db, key) {
+            try {
+                const { data, success, msg } = await GetKeyValue(server, db, key)
+                if (success) {
+                    const { type, ttl, value } = data
+                    const tab = useTabStore()
+                    tab.upsertTab({
+                        server,
+                        db,
+                        type,
+                        ttl,
+                        key,
+                        value,
+                    })
+                } else {
+                    console.warn('TODO: handle get key fail')
+                }
+            } finally {
+            }
+        },
+
+        /**
+         *
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @private
+         */
+        _addKey(connName, db, key) {
+            const dbs = this.databases[connName]
+            const dbDetail = get(dbs, db, {})
+
+            if (dbDetail == null) {
+                return
+            }
+
+            const descendantChain = [dbDetail]
+
+            const keyPart = split(key, separator)
+            let redisKey = ''
+            const keyLen = size(keyPart)
+            let added = false
+            for (let i = 0; i < keyLen; i++) {
+                redisKey += keyPart[i]
+
+                const node = last(descendantChain)
+                const nodeList = get(node, 'children', [])
+                const len = size(nodeList)
+                const isLastKeyPart = i === keyLen - 1
+                for (let j = 0; j < len + 1; j++) {
+                    const treeKey = get(nodeList[j], 'key')
+                    const isLast = j >= len - 1
+                    const currentKey = `${connName}/db${db}/${redisKey}@${
+                        isLastKeyPart ? ConnectionType.RedisValue : ConnectionType.RedisKey
+                    }`
+                    if (treeKey > currentKey || isLast) {
+                        // out of search range, add new item
+                        if (isLastKeyPart) {
+                            // key not exists, add new one
+                            const item = {
+                                key: currentKey,
+                                label: keyPart[i],
+                                name: connName,
+                                db,
+                                keys: 1,
+                                redisKey,
+                                type: ConnectionType.RedisValue,
+                            }
+                            if (isLast) {
+                                nodeList.push(item)
+                            } else {
+                                nodeList.splice(j, 0, item)
+                            }
+                            added = true
+                        } else {
+                            // layer not exists, add new one
+                            const item = {
+                                key: currentKey,
+                                label: keyPart[i],
+                                name: connName,
+                                db,
+                                keys: 0,
+                                redisKey,
+                                type: ConnectionType.RedisKey,
+                                children: [],
+                            }
+                            if (isLast) {
+                                nodeList.push(item)
+                                descendantChain.push(last(nodeList))
+                            } else {
+                                nodeList.splice(j, 0, item)
+                                descendantChain.push(nodeList[j])
+                            }
+                            redisKey += separator
+                            added = true
+                        }
+                        break
+                    } else if (treeKey === currentKey) {
+                        if (isLastKeyPart) {
+                            // same key exists, do nothing
+                            console.log('TODO: same key exist, do nothing now, should replace value later')
+                        } else {
+                            // same group exists, find into it's children
+                            descendantChain.push(nodeList[j])
+                            redisKey += separator
+                        }
+                        break
+                    }
+                }
+            }
+
+            // update ancestor node's info
+            if (added) {
+                const desLen = size(descendantChain)
+                for (let i = 0; i < desLen; i++) {
+                    const children = get(descendantChain[i], 'children', [])
+                    let keys = 0
+                    for (const child of children) {
+                        if (child.type === ConnectionType.RedisKey) {
+                            keys += get(child, 'keys', 1)
+                        } else if (child.type === ConnectionType.RedisValue) {
+                            keys += get(child, 'keys', 0)
+                        }
+                    }
+                    descendantChain[i].keys = keys
+                }
+            }
+        },
+
+        /**
+         * set redis key
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {number} keyType
+         * @param {any} value
+         * @param {number} ttl
+         * @returns {Promise<{[msg]: string, success: boolean}>}
+         */
+        async setKey(connName, db, key, keyType, value, ttl) {
+            try {
+                const { data, success, msg } = await SetKeyValue(connName, db, key, keyType, value, ttl)
+                if (success) {
+                    // update tree view data
+                    this._addKey(connName, db, key)
+                    return { success }
+                } else {
+                    return { success, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * update hash field
+         * when field is set, newField is null, delete field
+         * when field is null, newField is set, add new field
+         * when both field and newField are set, and field === newField, update field
+         * when both field and newField are set, and field !== newField, delete field and add newField
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {string} field
+         * @param {string} newField
+         * @param {string} value
+         * @returns {Promise<{[msg]: string, success: boolean, [updated]: {}}>}
+         */
+        async setHash(connName, db, key, field, newField, value) {
+            try {
+                const { data, success, msg } = await SetHashValue(connName, db, key, field, newField || '', value || '')
+                if (success) {
+                    const { updated = {} } = data
+                    return { success, updated }
+                } else {
+                    return { success, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * insert or update hash field item
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {number }action 0:ignore duplicated fields 1:overwrite duplicated fields
+         * @param {string[]} fieldItems field1, value1, filed2, value2...
+         * @returns {Promise<{[msg]: string, success: boolean, [updated]: {}}>}
+         */
+        async addHashField(connName, db, key, action, fieldItems) {
+            try {
+                const { data, success, msg } = await AddHashField(connName, db, key, action, fieldItems)
+                if (success) {
+                    const { updated = {} } = data
+                    return { success, updated }
+                } else {
+                    return { success: false, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * remove hash field
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {string} field
+         * @returns {Promise<{[msg]: {}, success: boolean, [removed]: string[]}>}
+         */
+        async removeHashField(connName, db, key, field) {
+            try {
+                const { data, success, msg } = await SetHashValue(connName, db, key, field, '', '')
+                if (success) {
+                    const { removed = [] } = data
+                    return { success, removed }
+                } else {
+                    return { success, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * insert list item
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {int} action 0: push to head, 1: push to tail
+         * @param {string[]}values
+         * @returns {Promise<*|{msg, success: boolean}>}
+         */
+        async addListItem(connName, db, key, action, values) {
+            try {
+                return AddListItem(connName, db, key, action, values)
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * prepend item to head of list
+         * @param connName
+         * @param db
+         * @param key
+         * @param values
+         * @returns {Promise<[msg]: string, success: boolean, [item]: []>}
+         */
+        async prependListItem(connName, db, key, values) {
+            try {
+                const { data, success, msg } = await AddListItem(connName, db, key, 0, values)
+                if (success) {
+                    const { left = [] } = data
+                    return { success, item: left }
+                } else {
+                    return { success: false, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * append item to tail of list
+         * @param connName
+         * @param db
+         * @param key
+         * @param values
+         * @returns {Promise<[msg]: string, success: boolean, [item]: any[]>}
+         */
+        async appendListItem(connName, db, key, values) {
+            try {
+                const { data, success, msg } = await AddListItem(connName, db, key, 1, values)
+                if (success) {
+                    const { right = [] } = data
+                    return { success, item: right }
+                } else {
+                    return { success: false, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * update value of list item by index
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {number} index
+         * @param {string} value
+         * @returns {Promise<{[msg]: string, success: boolean, [updated]: {}}>}
+         */
+        async updateListItem(connName, db, key, index, value) {
+            try {
+                const { data, success, msg } = await SetListItem(connName, db, key, index, value)
+                if (success) {
+                    const { updated = {} } = data
+                    return { success, updated }
+                } else {
+                    return { success, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * remove list item
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {number} index
+         * @returns {Promise<{[msg]: string, success: boolean, [removed]: string[]}>}
+         */
+        async removeListItem(connName, db, key, index) {
+            try {
+                const { data, success, msg } = await SetListItem(connName, db, key, index, '')
+                if (success) {
+                    const { removed = [] } = data
+                    return { success, removed }
+                } else {
+                    return { success, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * add item to set
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {string} value
+         * @returns {Promise<{[msg]: string, success: boolean}>}
+         */
+        async addSetItem(connName, db, key, value) {
+            try {
+                const { success, msg } = await SetSetItem(connName, db, key, false, [value])
+                if (success) {
+                    return { success }
+                } else {
+                    return { success, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * update value of set item
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {string} value
+         * @param {string} newValue
+         * @returns {Promise<{[msg]: string, success: boolean}>}
+         */
+        async updateSetItem(connName, db, key, value, newValue) {
+            try {
+                const { success, msg } = await UpdateSetItem(connName, db, key, value, newValue)
+                if (success) {
+                    return { success: true }
+                } else {
+                    return { success, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * remove item from set
+         * @param connName
+         * @param db
+         * @param key
+         * @param value
+         * @returns {Promise<{[msg]: string, success: boolean}>}
+         */
+        async removeSetItem(connName, db, key, value) {
+            try {
+                const { success, msg } = await SetSetItem(connName, db, key, true, [value])
+                if (success) {
+                    return { success }
+                } else {
+                    return { success, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * add item to sorted set
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {number} action
+         * @param {Object.<string, number>} vs value: score
+         * @returns {Promise<{[msg]: string, success: boolean}>}
+         */
+        async addZSetItem(connName, db, key, action, vs) {
+            try {
+                const { success, msg } = await AddZSetValue(connName, db, key, action, vs)
+                if (success) {
+                    return { success }
+                } else {
+                    return { success, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * update item of sorted set
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {string} value
+         * @param {string} newValue
+         * @param {number} score
+         * @returns {Promise<{[msg]: string, success: boolean, [updated]: {}, [removed]: []}>}
+         */
+        async updateZSetItem(connName, db, key, value, newValue, score) {
+            try {
+                const { data, success, msg } = await UpdateZSetValue(connName, db, key, value, newValue, score)
+                if (success) {
+                    const { updated, removed } = data
+                    return { success, updated, removed }
+                } else {
+                    return { success, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * remove item from sorted set
+         * @param {string} connName
+         * @param {number} db
+         * @param key
+         * @param {string} value
+         * @returns {Promise<{[msg]: string, success: boolean, [removed]: []}>}
+         */
+        async removeZSetItem(connName, db, key, value) {
+            try {
+                const { data, success, msg } = await UpdateZSetValue(connName, db, key, value, '', 0)
+                if (success) {
+                    const { removed } = data
+                    return { success, removed }
+                } else {
+                    return { success, msg }
+                }
+            } catch (e) {
+                return { success: false, msg: e.message }
+            }
+        },
+
+        /**
+         * reset key's ttl
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {number} ttl
+         * @returns {Promise<boolean>}
+         */
+        async setTTL(connName, db, key, ttl) {
+            try {
+                const { success, msg } = await SetKeyTTL(connName, db, key, ttl)
+                return success === true
+            } catch (e) {
+                return false
+            }
+        },
+
+        /**
+         *
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @private
+         */
+        _removeKey(connName, db, key) {
+            const dbs = this.databases[connName]
+            const dbDetail = get(dbs, db, {})
+
+            if (dbDetail == null) {
+                return
+            }
+
+            const descendantChain = [dbDetail]
+            const keyPart = split(key, separator)
+            let redisKey = ''
+            const keyLen = size(keyPart)
+            let deleted = false
+            let forceBreak = false
+            for (let i = 0; i < keyLen && !forceBreak; i++) {
+                redisKey += keyPart[i]
+
+                const node = last(descendantChain)
+                const nodeList = get(node, 'children', [])
+                const len = size(nodeList)
+                const isLastKeyPart = i === keyLen - 1
+                for (let j = 0; j < len; j++) {
+                    const treeKey = get(nodeList[j], 'key')
+                    const currentKey = `${connName}/db${db}/${redisKey}@${
+                        isLastKeyPart ? ConnectionType.RedisValue : ConnectionType.RedisKey
+                    }`
+                    if (treeKey > currentKey) {
+                        // out of search range, target not exists
+                        forceBreak = true
+                        break
+                    } else if (treeKey === currentKey) {
+                        if (isLastKeyPart) {
+                            // find target
+                            nodeList.splice(j, 1)
+                            node.keys -= 1
+                            deleted = true
+                            forceBreak = true
+                        } else {
+                            // find into it's children
+                            descendantChain.push(nodeList[j])
+                            redisKey += separator
+                        }
+                        break
+                    }
+                }
+
+                if (forceBreak) {
+                    break
+                }
+            }
+            // console.log(JSON.stringify(descendantChain))
+
+            // update ancestor node's info
+            if (deleted) {
+                const desLen = size(descendantChain)
+                for (let i = desLen - 1; i > 0; i--) {
+                    const children = get(descendantChain[i], 'children', [])
+                    const parent = descendantChain[i - 1]
+                    if (isEmpty(children)) {
+                        const parentChildren = get(parent, 'children', [])
+                        const k = get(descendantChain[i], 'key')
+                        remove(parentChildren, (item) => item.key === k)
+                    }
+                    parent.keys -= 1
+                }
+            }
+        },
+
+        /**
+         * remove redis key
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @returns {Promise<boolean>}
+         */
+        async removeKey(connName, db, key) {
+            try {
+                const { data, success, msg } = await RemoveKey(connName, db, key)
+                if (success) {
+                    // update tree view data
+                    this._removeKey(connName, db, key)
+
+                    // set tab content empty
+                    const tab = useTabStore()
+                    tab.emptyTab(connName)
+                    return true
+                }
+            } finally {
+            }
+            return false
+        },
+
+        /**
+         * rename key
+         * @param {string} connName
+         * @param {number} db
+         * @param {string} key
+         * @param {string} newKey
+         * @returns {Promise<{[msg]: string, success: boolean}>}
+         */
+        async renameKey(connName, db, key, newKey) {
+            const { success = false, msg } = await RenameKey(connName, db, key, newKey)
+            if (success) {
+                // delete old key and add new key struct
+                this._removeKey(connName, db, key)
+                this._addKey(connName, db, newKey)
+                return { success: true }
+            } else {
+                return { success: false, msg }
+            }
+        },
+    },
+})
+
+export default useConnectionStore
diff --git a/frontend/src/stores/connection.js b/frontend/src/stores/database.js
similarity index 92%
rename from frontend/src/stores/connection.js
rename to frontend/src/stores/database.js
index 80fa0c0..75549d8 100644
--- a/frontend/src/stores/connection.js
+++ b/frontend/src/stores/database.js
@@ -6,7 +6,6 @@ import {
     AddZSetValue,
     CloseConnection,
     GetKeyValue,
-    ListConnection,
     OpenConnection,
     OpenDatabase,
     RemoveKey,
@@ -21,12 +20,13 @@ import {
 } from '../../wailsjs/go/services/connectionService.js'
 import { ConnectionType } from '../consts/connection_type.js'
 import useTabStore from './tab.js'
+import useConnectionStore from './connections.js'
 
 const separator = ':'
 
-const useConnectionStore = defineStore('connection', {
+const useDatabaseStore = defineStore('database', {
     /**
-     * @typedef {Object} ConnectionItem
+     * @typedef {Object} DatabaseItem
      * @property {string} key
      * @property {string} label
      * @property {string} name - server name, type != ConnectionType.Group only
@@ -40,62 +40,14 @@ const useConnectionStore = defineStore('connection', {
 
     /**
      *
-     * @returns {{connections: ConnectionItem[]}}
+     * @returns {{connections: DatabaseItem[]}}
      */
     state: () => ({
         connections: [], // all connections list
+        databases: {}, // all database group by opened connections
     }),
     getters: {},
     actions: {
-        /**
-         * Load all store connections struct from local profile
-         * @returns {Promise<void>}
-         */
-        async initConnection() {
-            if (!isEmpty(this.connections)) {
-                return
-            }
-            const { data = [{ groupName: '', connections: [] }] } = await ListConnection()
-            for (let i = 0; i < data.length; i++) {
-                const group = data[i]
-                // Top level group
-                if (isEmpty(group.groupName)) {
-                    for (let j = 0; j < group.connections.length; j++) {
-                        const item = group.connections[j]
-                        this.connections.push({
-                            key: item.name,
-                            label: item.name,
-                            name: item.name,
-                            type: ConnectionType.Server,
-                            // isLeaf: false,
-                        })
-                    }
-                } else {
-                    // Custom group
-                    const children = []
-                    for (let j = 0; j < group.connections.length; j++) {
-                        const item = group.connections[j]
-                        const value = group.groupName + '/' + item.name
-                        children.push({
-                            key: value,
-                            label: item.name,
-                            name: item.name,
-                            type: ConnectionType.Server,
-                            children: j === group.connections.length - 1 ? undefined : [],
-                            // isLeaf: false,
-                        })
-                    }
-                    this.connections.push({
-                        key: group.groupName,
-                        label: group.groupName,
-                        type: ConnectionType.Group,
-                        children,
-                    })
-                }
-            }
-            console.debug(JSON.stringify(this.connections))
-        },
-
         /**
          * Open connection
          * @param {string} connName
@@ -107,7 +59,8 @@ const useConnectionStore = defineStore('connection', {
                 throw new Error(msg)
             }
             // append to db node to current connection
-            const connNode = this.getConnection(connName)
+            const connStore = useConnectionStore()
+            const connNode = connStore.getConnection(connName)
             if (connNode == null) {
                 throw new Error('no such connection')
             }
@@ -901,4 +854,4 @@ const useConnectionStore = defineStore('connection', {
     },
 })
 
-export default useConnectionStore
+export default useDatabaseStore
diff --git a/frontend/src/stores/tab.js b/frontend/src/stores/tab.js
index 3fb14f5..cd3e4d3 100644
--- a/frontend/src/stores/tab.js
+++ b/frontend/src/stores/tab.js
@@ -1,4 +1,4 @@
-import { find, findIndex, isEmpty, size } from 'lodash'
+import { find, findIndex, size } from 'lodash'
 import { defineStore } from 'pinia'
 
 const useTabStore = defineStore('tab', {
@@ -21,6 +21,8 @@ const useTabStore = defineStore('tab', {
      * @returns {{tabList: TabItem[], activatedTab: string, activatedIndex: number}}
      */
     state: () => ({
+        nav: 'server',
+        asideWidth: 300,
         tabList: [],
         activatedTab: '',
         activatedIndex: 0, // current activated tab index
@@ -31,9 +33,9 @@ const useTabStore = defineStore('tab', {
          * @returns {TabItem[]}
          */
         tabs() {
-            if (isEmpty(this.tabList)) {
-                this.newBlankTab()
-            }
+            // if (isEmpty(this.tabList)) {
+            //     this.newBlankTab()
+            // }
             return this.tabList
         },
 
@@ -53,7 +55,7 @@ const useTabStore = defineStore('tab', {
         currentTabIndex() {
             const len = size(this.tabs)
             if (this.activatedIndex < 0 || this.activatedIndex >= len) {
-                this.activatedIndex = 0
+                this._setActivatedIndex(0)
             }
             return this.tabs[this.activatedIndex]
         },
@@ -68,17 +70,22 @@ const useTabStore = defineStore('tab', {
                 title: 'new tab',
                 blank: true,
             })
-            this.activatedIndex = size(this.tabList) - 1
+            this._setActivatedIndex(size(this.tabList) - 1)
+        },
+
+        _setActivatedIndex(idx) {
+            this.activatedIndex = idx
+            this.nav = idx >= 0 ? 'structure' : 'server'
         },
 
         /**
          * update or insert a new tab if not exists with the same name
          * @param {string} server
-         * @param {number} db
-         * @param {number} type
-         * @param {number} ttl
-         * @param {string} key
-         * @param {*} value
+         * @param {number} [db]
+         * @param {number} [type]
+         * @param {number} [ttl]
+         * @param {string} [key]
+         * @param {*} [value]
          */
         upsertTab({ server, db, type, ttl, key, value }) {
             let tabIndex = findIndex(this.tabList, { name: server })
@@ -90,20 +97,21 @@ const useTabStore = defineStore('tab', {
                     type,
                     ttl,
                     key,
-                    value,
+                    valu,
                 })
                 tabIndex = this.tabList.length - 1
             }
             const tab = this.tabList[tabIndex]
             tab.blank = false
-            tab.title = `${server}/db${db}`
+            // tab.title = db !== undefined ? `${server}/db${db}` : `${server}`
+            tab.title = server
             tab.server = server
             tab.db = db
             tab.type = type
             tab.ttl = ttl
             tab.key = key
             tab.value = value
-            this.activatedIndex = tabIndex
+            this._setActivatedIndex(tabIndex)
             // this.activatedTab = tab.name
         },
 
@@ -149,23 +157,27 @@ const useTabStore = defineStore('tab', {
             const len = size(this.tabs)
             // ignore remove last blank tab
             if (len === 1 && this.tabs[0].blank) {
-                return
+                return null
             }
 
             if (tabIndex < 0 || tabIndex >= len) {
-                return
+                return null
             }
-            this.tabList.splice(tabIndex, 1)
+            const removed = this.tabList.splice(tabIndex, 1)
 
-            if (len === 1) {
-                this.newBlankTab()
-            } else {
-                // Update select index if removed index equal current selected
-                this.activatedIndex -= 1
-                if (this.activatedIndex < 0 && this.tabList.length > 0) {
-                    this.activatedIndex = 0
+            // update select index if removed index equal current selected
+            this.activatedIndex -= 1
+            if (this.activatedIndex < 0) {
+                if (this.tabList.length > 0) {
+                    this._setActivatedIndex(0)
+                } else {
+                    this._setActivatedIndex(-1)
                 }
+            } else {
+                this._setActivatedIndex(this.activatedIndex)
             }
+
+            return size(removed) > 0 ? removed[0] : null
         },
         removeTabByName(tabName) {
             const idx = findIndex(this.tabs, { name: tabName })
diff --git a/frontend/src/style.scss b/frontend/src/style.scss
index 2419964..5d5b12e 100644
--- a/frontend/src/style.scss
+++ b/frontend/src/style.scss
@@ -104,6 +104,6 @@ body {
 }
 
 .context-menu-item {
-  min-width: 120px;
+  min-width: 100px;
   padding-right: 10px;
 }