diff --git a/src/main/index.ts b/src/main/index.ts
index adb6b95..74d6252 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -29,6 +29,11 @@ async function mainWin() {
     win.maximize()
     win.webContents.openDevTools()
   }
+
+  // Test active push message to Renderer-process.
+  setInterval(() => {
+    win?.webContents.send('main-process-message', (new Date).toLocaleString())
+  }, 999)
 }
 
 app.whenReady().then(mainWin)
diff --git a/src/renderer/src/main.tsx b/src/renderer/src/main.tsx
index 8787ad8..7f331e0 100644
--- a/src/renderer/src/main.tsx
+++ b/src/renderer/src/main.tsx
@@ -17,6 +17,11 @@ ReactDOM.render(
 
 console.log('contextBridge ->', window.bridge)
 
+// Use ipcRenderer.on
+window.bridge.ipcRenderer.on('main-process-message', (_event, ...args) => {
+  console.log('[Receive Main-process message]:', ...args)
+})
+
 // Use 'electron-store'
 const store = {
   async get(key: string) {
@@ -40,7 +45,6 @@ const store = {
     }
   },
 };
-
 (async () => {
   await store.set('Date.now', Date.now())
   console.log('electron-store ->', 'Date.now:', await store.get('Date.now'))