diff --git a/entry/src/main/ets/common/database/PreferencesUtil.ets b/entry/src/main/ets/common/database/PreferencesUtil.ets
index ab2f0117ec3727e5c18518d992b13eda1312c8a0..6d7cb585ba16b8bedd3400d0bf1765409cfbc3df 100644
--- a/entry/src/main/ets/common/database/PreferencesUtil.ets
+++ b/entry/src/main/ets/common/database/PreferencesUtil.ets
@@ -13,6 +13,7 @@
  * limitations under the License.
  */
 
+import { BusinessError } from '@kit.BasicServicesKit';
 import { preferences } from '@kit.ArkData';
 import { GlobalContext } from '../utils/GlobalContext';
 import Logger from '../utils/Logger';
@@ -26,38 +27,52 @@ const KEY_APP_FONT_SIZE = 'appFontSize';
  */
 export class PreferencesUtil {
   createFontPreferences(context: Context) {
-    let fontPreferences: Function = (() => {
-      let preference: Promise<preferences.Preferences> = preferences.getPreferences(context, PREFERENCES_NAME);
-      return preference;
-    });
-    GlobalContext.getContext().setObject('getFontPreferences', fontPreferences);
+    preferences.getPreferences(context, PREFERENCES_NAME).then((pref: preferences.Preferences) => {
+      GlobalContext.getContext().setObject('getFontPreferences', pref);
+    }).catch((error: BusinessError) => {
+      Logger.error(TAG, `getPreferences err, code: ${error.code}, mesage: ${error.message}`);
+    })
   }
 
   saveDefaultFontSize(fontSize: number) {
-    let getFontPreferences: Function = GlobalContext.getContext().getObject('getFontPreferences') as Function;
-    getFontPreferences().then((preferences: preferences.Preferences) => {
-      preferences.has(KEY_APP_FONT_SIZE).then(async (isExist: boolean) => {
-        Logger.info(TAG, 'preferences has changeFontSize is ' + isExist);
-        if (!isExist) {
-          await preferences.put(KEY_APP_FONT_SIZE, fontSize);
-          preferences.flush();
-        }
+    try {
+      let getFontPreferences: Function = GlobalContext.getContext().getObject('getFontPreferences') as Function;
+      getFontPreferences().then((preferences: preferences.Preferences) => {
+        preferences.has(KEY_APP_FONT_SIZE).then(async (isExist: boolean) => {
+          Logger.info(TAG, 'preferences has changeFontSize is ' + isExist);
+          if (!isExist) {
+            await preferences.put(KEY_APP_FONT_SIZE, fontSize);
+            preferences.flush().catch((error: BusinessError) => {
+              Logger.error(TAG, `flush err, code: ${error.code}, mesage: ${error.message}`);
+            });
+          }
+        }).catch((err: Error) => {
+          Logger.error(TAG, 'Has the value failed with err: ' + err);
+        });
       }).catch((err: Error) => {
-        Logger.error(TAG, 'Has the value failed with err: ' + err);
+        Logger.error(TAG, 'Get the preferences failed, err: ' + err);
       });
-    }).catch((err: Error) => {
-      Logger.error(TAG, 'Get the preferences failed, err: ' + err);
-    });
+    } catch (err) {
+      let error = err as BusinessError;
+      Logger.error(TAG, `saveDefaultFontSize err, code: ${error.code}, mesage: ${error.message}`);
+    }
   }
 
   saveChangeFontSize(fontSize: number) {
     let getFontPreferences: Function = GlobalContext.getContext().getObject('getFontPreferences') as Function;
-    getFontPreferences().then(async (preferences: preferences.Preferences) => {
-      await preferences.put(KEY_APP_FONT_SIZE, fontSize);
-      preferences.flush();
-    }).catch((err: Error) => {
-      Logger.error(TAG, 'put the preferences failed, err: ' + err);
-    });
+    try {
+      getFontPreferences().then(async (preferences: preferences.Preferences) => {
+        await preferences.put(KEY_APP_FONT_SIZE, fontSize);
+        preferences.flush().catch((error: BusinessError) => {
+          Logger.error(TAG, `getFontPreferences err, code: ${error.code}, mesage: ${error.message}`);
+        });
+      }).catch((err: Error) => {
+        Logger.error(TAG, 'put the preferences failed, err: ' + err);
+      });
+    } catch (err) {
+      let error = err as BusinessError;
+      Logger.error(TAG, `saveChangeFontSize err, code: ${error.code}, mesage: ${error.message}`);
+    }
   }
 
   async getChangeFontSize() {
@@ -71,7 +86,9 @@ export class PreferencesUtil {
   async deleteChangeFontSize() {
     let getFontPreferences: Function = GlobalContext.getContext().getObject('getFontPreferences') as Function;
     const preferences: preferences.Preferences = await getFontPreferences();
-    let deleteValue = preferences.delete(KEY_APP_FONT_SIZE);
+    let deleteValue = preferences.delete(KEY_APP_FONT_SIZE).catch((error: BusinessError) => {
+      Logger.error(TAG, `delete err, code: ${error.code}, mesage: ${error.message}`);
+    });
     deleteValue.then(() => {
       Logger.info(TAG, 'Succeeded in deleting the key appFontSize.');
     }).catch((err: Error) => {