diff --git a/common/src/main/ets/util/FormatUtils.ts b/common/src/main/ets/util/FormatUtils.ts
index cb46447d7a25004872521476c0fbeb9d68fee226..28ca9e05c2af3ee4e4c58ac5c8fdba0354157b70 100644
--- a/common/src/main/ets/util/FormatUtils.ts
+++ b/common/src/main/ets/util/FormatUtils.ts
@@ -15,6 +15,7 @@
 
 import type common from '@ohos.app.ability.common';
 import { DeviceUtils } from '../util/DeviceUtils';
+import { Logutils } from '../LogUtils';
 
 /**
  * 格式化工具
@@ -100,4 +101,22 @@ export namespace FormatUtils {
     let numfmt: Intl.NumberFormat = new Intl.NumberFormat(language, {style:'percent', notation:'standard'});
     return numfmt.format(num);
   }
+
+  /**
+   * JSON stringify方法封装
+   *
+   * @param value JS对象
+   * @return json字符串
+   */
+  export function stringify<T>(value: T): string {
+    if (value) {
+      try {
+        return JSON.stringify(value);
+      } catch (exception) {
+        Logutils.error('FormateUtils', 'JSON.stringify failed !!');
+        return '';
+      }
+    }
+    return;
+  }
 }
\ No newline at end of file
diff --git a/feature/ota/src/main/ets/dialog/CountDownInstallDialogBuilder.ets b/feature/ota/src/main/ets/dialog/CountDownInstallDialogBuilder.ets
index 1602bc54639942f40804dd238eeab1f4033cbe62..e3c0b99c8ba78fd115861e319556b5385279c8e0 100644
--- a/feature/ota/src/main/ets/dialog/CountDownInstallDialogBuilder.ets
+++ b/feature/ota/src/main/ets/dialog/CountDownInstallDialogBuilder.ets
@@ -112,7 +112,7 @@ export struct CountDownInstallDialogBuilder {
       }
       this.confirm();
     })
-    .backgroundColor($r('sys.float.ohos_id_corner_radius_button'))
+    .backgroundColor($r('sys.color.ohos_id_color_dialog_bg_transparent'))
     .height($r('app.float.dialog_button_height'))
     .layoutWeight(1)
     .padding({
@@ -147,7 +147,7 @@ export struct CountDownInstallDialogBuilder {
             }
             this.cancel();
           })
-          .backgroundColor($r('sys.float.ohos_id_corner_radius_button'))
+          .backgroundColor($r('sys.color.ohos_id_color_dialog_bg_transparent'))
           .fontColor($r('app.color.blue'))
           .height($r('app.float.dialog_button_height'))
           .fontSize($r('app.float.text_size_btn'))
diff --git a/feature/ota/src/main/ets/manager/OtaUpdateManager.ets b/feature/ota/src/main/ets/manager/OtaUpdateManager.ets
index e617369a743469dc128c2ac70692f2e2bed4cc4c..cf5c08c332b9cba5baee9a27403496855fac8780 100644
--- a/feature/ota/src/main/ets/manager/OtaUpdateManager.ets
+++ b/feature/ota/src/main/ets/manager/OtaUpdateManager.ets
@@ -389,7 +389,7 @@ export class OtaUpdateManager {
 
   private wantParser(want: Want): update.EventInfo {
     let eventInfo: update.EventInfo;
-    let eventInfoStr = want.parameters[OtaUpdateManager.KEY];
+    let eventInfoStr = want?.parameters?.[OtaUpdateManager.KEY];
     if (typeof eventInfoStr === 'string') {
       eventInfo = JSON.parse(eventInfoStr);
     }
diff --git a/product/oh/base/src/main/ets/ServiceExtAbility/service.ts b/product/oh/base/src/main/ets/ServiceExtAbility/service.ts
index cc0fe000bc0cb47360e4c6ea11d24bcf66cea681..446ff3ccd3a8b2d97a3501d1a5f3715154cb68c7 100644
--- a/product/oh/base/src/main/ets/ServiceExtAbility/service.ts
+++ b/product/oh/base/src/main/ets/ServiceExtAbility/service.ts
@@ -16,6 +16,7 @@
 import Extension from '@ohos.app.ability.ServiceExtensionAbility';
 import type Want from '@ohos.app.ability.Want';
 import type rpc from '@ohos.rpc';
+import { FormatUtils } from '@ohos/common/src/main/ets/util/FormatUtils';
 import { OtaUpdateManager } from '@ohos/ota/src/main/ets/manager/OtaUpdateManager';
 import { LogUtils } from '@ohos/common/src/main/ets/util/LogUtils';
 
@@ -30,12 +31,12 @@ export default class ServiceExtAbility extends Extension {
   private startIdArray: number[] = [];
 
   onCreate(want: Want): void {
-    LogUtils.log(ServiceExtAbility.TAG, 'onCreate:' + JSON.stringify(want));
+    LogUtils.log(ServiceExtAbility.TAG, 'onCreate:' + FormatUtils.stringify(want));
     globalThis.extensionContext = this.context; // when start ServiceExtAbility ,set context
   }
 
   async onRequest(want: Want, startId: number): Promise<void> {
-    LogUtils.log(ServiceExtAbility.TAG, `onRequest, want: ${want.abilityName}`);
+    LogUtils.log(ServiceExtAbility.TAG, `onRequest, want: ${want?.abilityName}`);
     this.startIdArray.push(startId);
     globalThis.extensionContext = this.context;
     await OtaUpdateManager.getInstance().handleWant(want, globalThis.extensionContext);
@@ -43,7 +44,7 @@ export default class ServiceExtAbility extends Extension {
   }
 
   onConnect(want: Want): rpc.RemoteObject {
-    LogUtils.log(ServiceExtAbility.TAG, `onConnect , want: ${want.abilityName}`);
+    LogUtils.log(ServiceExtAbility.TAG, `onConnect , want: ${want?.abilityName}`);
     return null;
   }