diff --git a/src/common/Initializer.ts b/src/common/Initializer.ts
index 5567bbd..bf7a1e7 100644
--- a/src/common/Initializer.ts
+++ b/src/common/Initializer.ts
@@ -91,14 +91,6 @@ export default class Initializer {
     if (global_data.applicationConfig && $store) {
       $store.commit("setWallCol", global_data.applicationConfig.wall_col);
       $store.commit("setWallRow", global_data.applicationConfig.wall_row);
-      $store.commit(
-        "setDeviceScreenWidth",
-        global_data.applicationConfig.screen_width
-      );
-      $store.commit(
-        "setDeviceScreenHeight",
-        global_data.applicationConfig.screen_height
-      );
       $store.commit(
         "setPowerOnPlan",
         global_data.applicationConfig.power_on_plan
diff --git a/src/common/RemoteDataExangeProcesser.ts b/src/common/RemoteDataExangeProcesser.ts
index 9b2e247..7d44923 100644
--- a/src/common/RemoteDataExangeProcesser.ts
+++ b/src/common/RemoteDataExangeProcesser.ts
@@ -58,14 +58,6 @@ export default class RemoteDataExangeProcesser {
                   "setWallRow",
                   global_data.applicationConfig.wall_row
                 );
-                $store.commit(
-                  "setDeviceScreenWidth",
-                  global_data.applicationConfig.screen_width
-                );
-                $store.commit(
-                  "setDeviceScreenHeight",
-                  global_data.applicationConfig.screen_height
-                );
                 $store.commit(
                   "setPowerOnPlan",
                   global_data.applicationConfig.power_on_plan
@@ -387,6 +379,32 @@ export default class RemoteDataExangeProcesser {
             }
           }
           break;
+        case Protocol.Commands.kDesktopResolutionChangedNotify:
+          {
+            const temp = JSON.parse(
+              notify.data
+            ) as Protocol.DesktopResolutionChangedNotifyEntity;
+            if (temp) {
+              $store.commit("setDeviceScreenWidth", temp.width);
+              $store.commit("setDeviceScreenHeight", temp.height);
+              $store.commit("setDeviceScreenRefreshRate", temp.refresh_rate);
+              $store.commit("setDeviceScreenConnectState", true);
+            }
+          }
+          break;
+        case Protocol.Commands.kDesktopResolutionChangedNotify:
+          {
+            const temp = JSON.parse(
+              notify.data
+            ) as Protocol.DesktopDisconnectNotifyEntity;
+            if (temp) {
+              $store.commit("setDeviceScreenConnectState", false);
+            }
+          }
+          break;
+        default:
+          console.log(notify.data);
+          break;
       }
     } catch {}
   }
diff --git a/src/components/SystemSettingDialog.vue b/src/components/SystemSettingDialog.vue
index 66d66ad..e2712f1 100644
--- a/src/components/SystemSettingDialog.vue
+++ b/src/components/SystemSettingDialog.vue
@@ -758,7 +758,7 @@ export default defineComponent({
     let old_resolution: string = "";
     let old_rotate: number = 0;
     let device_resolution = ref("");
-    let device_resolution_options = ref(["11", "22", "33"]);
+    let device_resolution_options: Ref<string[]> = ref([]);
     let device_rotate = ref(0);
     let device_rotate_options = ref([
       {
@@ -882,7 +882,17 @@ export default defineComponent({
             }
 
             {
-              const val = device_resolution_options.value.find(
+              let val = device_resolution_options.value.find(
+                (element) =>
+                  element &&
+                  element == support_resolutions.current_device_resolution
+              );
+              if (!val) {
+                device_resolution_options.value.push(
+                  support_resolutions.current_device_resolution
+                );
+              }
+              val = device_resolution_options.value.find(
                 (element) =>
                   element &&
                   element == support_resolutions.current_device_resolution
diff --git a/src/entities/ApplicationConfigEntity.ts b/src/entities/ApplicationConfigEntity.ts
index 5785257..7f87bac 100644
--- a/src/entities/ApplicationConfigEntity.ts
+++ b/src/entities/ApplicationConfigEntity.ts
@@ -9,8 +9,6 @@ export default class ApplicationConfigEntity {
   time_zone: number = 21;
   wall_row: number = 1;
   wall_col: number = 1;
-  screen_width: number = 1;
-  screen_height: number = 1;
   tcp_port: string = "";
   udp_port: string = "";
   websocket_port: string = "";
diff --git a/src/entities/WSProtocol.ts b/src/entities/WSProtocol.ts
index c069c8b..e321c89 100644
--- a/src/entities/WSProtocol.ts
+++ b/src/entities/WSProtocol.ts
@@ -281,6 +281,14 @@ export namespace Protocol {
       return Commands.PROTOCOL_PREFIX + "PollingStateChanged";
     }
 
+    public static get kDesktopResolutionChangedNotify() {
+      return Commands.PROTOCOL_PREFIX + "DesktopResolutionChangedNotify";
+    }
+
+    public static get kDesktopDisconnectNotify() {
+      return Commands.PROTOCOL_PREFIX + "DesktopDisconnectNotify";
+    }
+
     static _all_commands = new Set([
       Commands.kUnKnowCommand,
       Commands.kSearchDevice,
@@ -349,6 +357,8 @@ export namespace Protocol {
       Commands.kStopPolling,
       Commands.kStartPolling,
       Commands.kPollingStateChanged,
+      Commands.kDesktopResolutionChangedNotify,
+      Commands.kDesktopDisconnectNotify,
     ]);
 
     public static get AllCommands() {
@@ -1647,4 +1657,24 @@ export namespace Protocol {
       this.command = Commands.kLowerWindow;
     }
   }
+
+  export class DesktopResolutionChangedNotifyEntity extends PacketEntity {
+    width: number = 0;
+    height: number = 0;
+    refresh_rate: number = 0;
+
+    constructor() {
+      super();
+      this.command = Commands.kDesktopResolutionChangedNotify;
+    }
+  }
+
+  export class DesktopDisconnectNotifyEntity extends PacketEntity {
+    timestamp: number = 0;
+
+    constructor() {
+      super();
+      this.command = Commands.kDesktopDisconnectNotify;
+    }
+  }
 }
diff --git a/src/i18n/zh-CN/index.ts b/src/i18n/zh-CN/index.ts
index df3b78a..dd57db4 100644
--- a/src/i18n/zh-CN/index.ts
+++ b/src/i18n/zh-CN/index.ts
@@ -321,4 +321,6 @@ export default {
   "the list of previously saved window list is about to be overwritten":
     "之前保存的窗口列表将被覆盖",
   "are you sure about the update": "确定更新吗",
+  "device info": "设备信息",
+  resolution: "分辨率",
 };
diff --git a/src/pages/TopToolBar.vue b/src/pages/TopToolBar.vue
index 1dfc154..399816b 100644
--- a/src/pages/TopToolBar.vue
+++ b/src/pages/TopToolBar.vue
@@ -193,6 +193,14 @@
               {{ $t("upgrade") }}
             </q-item-section>
           </q-item>
+          <q-item clickable v-close-popup @click="showDeviceInfo">
+            <q-item-section avatar>
+              <q-icon name="devices" />
+            </q-item-section>
+            <q-item-section>
+              {{ $t("device info") }}
+            </q-item-section>
+          </q-item>
           <q-item
             clickable
             v-close-popup
@@ -355,6 +363,19 @@ export default defineComponent({
         SessionStorage.clear();
         window.location.reload();
       },
+      showDeviceInfo() {
+        $q.dialog({
+          title: $t.t("device info"),
+          message:
+            $t.t("resolution") +
+            ": " +
+            $store.state.device_screen_width +
+            "X" +
+            $store.state.device_screen_height +
+            "@" +
+            $store.state.device_screen_refresh_rate,
+        });
+      },
     };
   },
 });
diff --git a/src/store/index.ts b/src/store/index.ts
index 168db65..67466bd 100644
--- a/src/store/index.ts
+++ b/src/store/index.ts
@@ -37,6 +37,8 @@ export interface StateInterface {
   wall_col: number;
   device_screen_width: number;
   device_screen_height: number;
+  device_screen_refresh_rate: number;
+  device_screen_connect_state: boolean;
   windows: WindowOpenNotifyEntity[];
   windows_sort: string[];
   device_ip_address: string;
@@ -270,6 +272,8 @@ export default store(function (/* { ssrContext } */) {
       wall_row: 1,
       device_screen_width: 1920,
       device_screen_height: 1080,
+      device_screen_refresh_rate: 60,
+      device_screen_connect_state: true,
       windows: [],
       windows_sort: [],
       device_ip_address: "localhost",
@@ -437,6 +441,17 @@ export default store(function (/* { ssrContext } */) {
           state.device_screen_height = num;
         }
       },
+      setDeviceScreenRefreshRate(state: StateInterface, playload?: any) {
+        const num = parseInt(playload);
+        if (num != NaN && num > 0) {
+          state.device_screen_refresh_rate = num;
+        }
+      },
+      setDeviceScreenConnectState(state: StateInterface, playload?: any) {
+        try {
+          state.device_screen_connect_state = JSON.parse(playload);
+        } catch {}
+      },
       // signal source
       setSignalSourceTree(
         state: StateInterface,