diff --git a/Readme.md b/Readme.md
index 3d2aa05..55b8526 100644
--- a/Readme.md
+++ b/Readme.md
@@ -16,6 +16,10 @@
 
 ## 更新日志
 
+- 2022.04.26
+  1. 版本号改为`年.月.日`格式
+  2. 检测未读消息, 如有, 托盘图标显示红点。
+
 - 2022.04.24
   1. electron升级为18.0
   2. 修复自动登录功能
diff --git a/package.json b/package.json
index b191cd4..c711570 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "dtalk",
-  "version": "3.8.12",
+  "version": "22.4.26",
   "description": "钉钉-Linux版",
   "main": "src/main.js",
   "scripts": {
diff --git a/src/images/tray_a.png b/src/images/tray_a.png
new file mode 100644
index 0000000..2332a0f
Binary files /dev/null and b/src/images/tray_a.png differ
diff --git a/src/main.js b/src/main.js
index 641cf5e..4fa2573 100644
--- a/src/main.js
+++ b/src/main.js
@@ -29,7 +29,7 @@ app.once('ready', () => {
 
   let win = createMainWindow(join(ROOT, './images/app.png'))
 
-  createTray(win)
+  app.toggleTray = createTray(win)
 })
 
 ipcMain.on('app', (ev, conn) => {
@@ -73,5 +73,12 @@ ipcMain.on('app', (ev, conn) => {
         ev.returnValue = true
       }
       break
+
+    case 'toggleTray':
+      {
+        app.toggleTray(conn.data)
+        ev.returnValue = true
+      }
+      break
   }
 })
diff --git a/src/tools/inject.js b/src/tools/inject.js
index acfa642..09e9c81 100644
--- a/src/tools/inject.js
+++ b/src/tools/inject.js
@@ -24,5 +24,9 @@ contextBridge.exposeInMainWorld('electron', {
 
   saveCookie() {
     return ipcRenderer.sendSync('app', { type: 'saveCookie' })
+  },
+
+  toggleTray(unread) {
+    return ipcRenderer.sendSync('app', { type: 'toggleTray', data: unread })
   }
 })
diff --git a/src/tools/tray.js b/src/tools/tray.js
index ba4e206..e10c8ea 100644
--- a/src/tools/tray.js
+++ b/src/tools/tray.js
@@ -8,8 +8,11 @@ const { app, Tray, Menu } = require('electron')
 const path = require('path')
 const ROOT = __dirname
 
+const TRAY_ICO = path.join(ROOT, '../images/tray.png')
+const TRAY_ICO_A = path.join(ROOT, '../images/tray_a.png')
+
 module.exports = function (win) {
-  app.__TRAY__ = new Tray(path.join(ROOT, '../images/tray.png'))
+  let dTray = new Tray(TRAY_ICO)
   let menuList = Menu.buildFromTemplate([
     {
       label: '显示主窗口',
@@ -25,9 +28,25 @@ module.exports = function (win) {
       }
     }
   ])
-  app.__TRAY__.on('click', _ => {
+  let unreadCache = false
+
+  dTray.on('click', _ => {
     win.show()
   })
 
-  app.__TRAY__.setContextMenu(menuList)
+  dTray.setContextMenu(menuList)
+
+  return function (unread) {
+    // 缓存状态, 避免频繁修改tray图标
+    if (unreadCache === unread) {
+      return
+    }
+    unreadCache = unread
+
+    if (unread) {
+      dTray.setImage(TRAY_ICO_A)
+    } else {
+      dTray.setImage(TRAY_ICO)
+    }
+  }
 }
diff --git a/src/tools/windows.js b/src/tools/windows.js
index ce3a203..f64c054 100644
--- a/src/tools/windows.js
+++ b/src/tools/windows.js
@@ -33,7 +33,7 @@ exports.createMainWindow = function (icon) {
   win.on('ready-to-show', _ => {
     win.show()
 
-    // win.openDevTools()
+    win.openDevTools()
   })
 
   win.webContents.on('dom-ready', ev => {
@@ -70,6 +70,20 @@ exports.createMainWindow = function (icon) {
             location.reload()
           }, 2000)
         }
+
+        function checkUnReadMsg() {
+
+          window.__timer = setTimeout(function() {
+            var $box = document.body.querySelector('.conv-lists-box')
+            var $unread = $box.querySelectorAll('.unread-num')
+
+            electro($unread.length > 0)
+            clearTimeout(window.__timer)
+            checkUnReadMsg()
+          }, 1500)
+        }
+
+        checkUnReadMsg()
       }