diff --git a/code/BasicFeature/Web/Browser/entry/src/main/ets/common/TitleBar.ets b/code/BasicFeature/Web/Browser/entry/src/main/ets/common/TitleBar.ets
index 58ce8501c1d13e206efe8b5fd6225772c2300082..d6ee398fe28324848317880e58820d7068d0e398 100644
--- a/code/BasicFeature/Web/Browser/entry/src/main/ets/common/TitleBar.ets
+++ b/code/BasicFeature/Web/Browser/entry/src/main/ets/common/TitleBar.ets
@@ -101,7 +101,8 @@ export struct TabletTitle {
               this.browser.Refresh();
               break;
             case 4:
-              this.browser.webControllerArray[this.browser.tabArrayIndex].controller.loadUrl($rawfile('pad.html'));
+              this.browser.webControllerArray[this.browser.tabArrayIndex]?.controller
+                .loadUrl($rawfile('pad.html'));
               break;
           }
         })
@@ -120,7 +121,8 @@ export struct TabletTitle {
         .onSubmit((enterKey: EnterKeyType) => {
           Logger.info(TAG, `onSubmit`)
           if (this.addr.length !== 0) {
-            this.browser.webControllerArray[this.browser.tabArrayIndex].controller.loadUrl(`https://${this.addr}`);
+            this.browser.webControllerArray[this.browser.tabArrayIndex]?.controller
+              .loadUrl(`https://${this.addr}`);
             this.addr = '';
           }
         })
@@ -216,19 +218,20 @@ export struct WebTab {
   testObj = {
     test: (addr) => {
       Logger.info(TAG, `addr= ${this.browser.tabArrayIndex}`);
-      this.browser.webControllerArray[this.browser.tabArrayIndex].controller.loadUrl(`https://${addr}`);
+      this.browser.webControllerArray[this.browser.tabArrayIndex]?.controller.loadUrl(`https://${addr}`);
     },
     searchWord: (word: string) => {
       Logger.info(`search word= ${word}`);
       let code = encodeURI(word);
-      this.browser.webControllerArray[this.browser.tabArrayIndex].controller.loadUrl(`https://www.bing.com/search?q=${code}`);
+      this.browser.webControllerArray[this.browser.tabArrayIndex]?.controller
+        .loadUrl(`https://www.bing.com/search?q=${code}`);
     }
   }
 
   aboutToAppear() {
     webview.once('webInited', () => {
       try {
-        this.userAgent = this.browser.webControllerArray[this.browser.tabArrayIndex].controller.getUserAgent();
+        this.userAgent = this.browser.webControllerArray[this.browser.tabArrayIndex]?.controller.getUserAgent();
         Logger.info(`getUserAgent successed, detail: ${this.userAgent}`);
       } catch (error) {
         Logger.error(`getUserAgent failed, error info: ${this.userAgent}`);
diff --git a/code/BasicFeature/Web/Browser/entry/src/main/ets/model/Browser.ets b/code/BasicFeature/Web/Browser/entry/src/main/ets/model/Browser.ets
index e92f67b8293318707f56ed0701ea0c0172a6d27d..23f28a66ccdd0d656c6da1882b8fae43ccde2b99 100644
--- a/code/BasicFeature/Web/Browser/entry/src/main/ets/model/Browser.ets
+++ b/code/BasicFeature/Web/Browser/entry/src/main/ets/model/Browser.ets
@@ -111,22 +111,22 @@ export class Browser {
 
   loadUrl(addr: string) {
     addr = "https://" + addr;
-    this.webControllerArray[this.tabArrayIndex].controller.loadUrl(addr);
+    this.webControllerArray[this.tabArrayIndex]?.controller.loadUrl(addr);
   }
 
   Back() {
-    if (this.webControllerArray[this.tabArrayIndex].controller.accessBackward()) {
-      this.webControllerArray[this.tabArrayIndex].controller.backward()
+    if (this.webControllerArray[this.tabArrayIndex]?.controller.accessBackward()) {
+      this.webControllerArray[this.tabArrayIndex]?.controller.backward();
     }
   }
 
   Forward() {
-    if (this.webControllerArray[this.tabArrayIndex].controller.accessForward()) {
-      this.webControllerArray[this.tabArrayIndex].controller.forward()
+    if (this.webControllerArray[this.tabArrayIndex]?.controller.accessForward()) {
+      this.webControllerArray[this.tabArrayIndex]?.controller.forward();
     }
   }
 
   Refresh() {
-    this.webControllerArray[this.tabArrayIndex].controller.refresh()
+    this.webControllerArray[this.tabArrayIndex]?.controller.refresh();
   }
-}
+}
\ No newline at end of file