diff --git a/entry/src/main/ets/common/config.ets b/entry/src/main/ets/common/config.ets
new file mode 100644
index 0000000..635c42b
--- /dev/null
+++ b/entry/src/main/ets/common/config.ets
@@ -0,0 +1,23 @@
+import relationalStore from '@ohos.data.relationalStore'
+
+export const DatabaseConfig = {
+  RDB_TAG: '[Debug.Rdb]',
+
+
+  STORE_CONFIG: {
+    name: "RdbTest.db",
+    securityLevel: relationalStore.SecurityLevel.S1,
+  },
+
+  TODO_TABLE: {
+    tableName: 'todoTable',
+    sqlCreate: `CREATE TABLE IF NOT EXISTS todoTable(
+                  id INTEGER PRIMARY KEY AUTOINCREMENT,
+                  status INTEGER,
+                  content TEXT
+                )`,
+    columns: ['id', 'status', 'content'],
+    update1to3: ``,
+    update2to3: ``,
+  },
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/common/database/Rdb.ets b/entry/src/main/ets/common/database/Rdb.ets
new file mode 100644
index 0000000..cecd72b
--- /dev/null
+++ b/entry/src/main/ets/common/database/Rdb.ets
@@ -0,0 +1,82 @@
+import relationalStore from '@ohos.data.relationalStore';
+import { DatabaseConfig } from '../config';
+
+export default class Rdb {
+  private rdbStore: relationalStore.RdbStore = null;
+  private tableName: string;
+  private sqlCreateTable: string;
+  private columns: Array<string>;
+
+  constructor(tableName: string, sqlCreateTable: string, columns: Array<string>) {
+    this.tableName = tableName;
+    this.sqlCreateTable = sqlCreateTable;
+    this.columns = columns;
+  }
+
+
+  async getRdbStore(callback) {
+    const context = getContext(this)
+    try {
+      const store = await relationalStore.getRdbStore(context, DatabaseConfig.STORE_CONFIG)
+      this.rdbStore = store;
+      console.info('getRdbStore() finished.');
+      callback(store)
+    } catch (err) {
+      console.error('getRdbStore() failed, error: ' + err)
+    }
+  }
+
+  async insertData(data) {
+    const valueBucket = data
+
+    try {
+      const rowId = await this.rdbStore.insert(this.tableName, valueBucket);
+      console.info("insertData() finished: ", rowId)
+
+      return rowId;
+    } catch (err) {
+      console.error('insertData() failed, err: ' + err)
+    }
+  }
+
+  async updateData(predicates, data) {
+    const valueBucket = data;
+    try {
+      const rows = await this.rdbStore.update(valueBucket, predicates);
+      console.info('updateData() finished: ' + rows);
+
+      return rows;
+    } catch (err) {
+      console.error('update() failed, err: ' + err);
+    }
+  }
+
+  async deleteData(predicates) {
+    try {
+      const rows = await this.rdbStore.delete(predicates);
+      console.info('deleteData() finished: ' + rows);
+      return rows;
+    } catch (err) {
+      console.error('deleteData() failed, err: ' + err);
+    }
+  }
+
+  async query(predicates, mapFunc: Function) {
+    try {
+      const resSet = await this.rdbStore.query(predicates, this.columns)
+
+      const resList = [];
+      while (resSet.goToNextRow()) {
+        const resKeys = this.columns;
+        const resItem = mapFunc(resKeys, resSet);
+        resList.push(resItem);
+      }
+      resSet.close()
+
+      return resList;
+    }
+    catch (err) {
+      console.error('query() failed, err: ', err);
+    }
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/common/database/tables/TodoTable.ets b/entry/src/main/ets/common/database/tables/TodoTable.ets
new file mode 100644
index 0000000..e2e0d55
--- /dev/null
+++ b/entry/src/main/ets/common/database/tables/TodoTable.ets
@@ -0,0 +1,85 @@
+import { TodoData } from '../../types/Todo'
+import { DatabaseConfig } from '../../config'
+import Rdb from '../Rdb'
+import relationalStore from '@ohos.data.relationalStore'
+
+export default class TodoTable {
+  private todoTable = new Rdb(
+    DatabaseConfig.TODO_TABLE.tableName,
+    DatabaseConfig.TODO_TABLE.sqlCreate,
+    DatabaseConfig.TODO_TABLE.columns
+  )
+
+  constructor(callback: Function = () => {
+  }) {
+    this.getRdbStore(callback)
+  }
+
+  private getRdbStore(callback) {
+    // 假设当前数据库版本为3
+    this.todoTable.getRdbStore(store => {
+      // 当数据库创建时，数据库版本默认为0
+      if (store.version == 0) {
+        store.executeSql(DatabaseConfig.TODO_TABLE.sqlCreate);
+        store.version = 3;
+      }
+      // 如果数据库版本不为0，且和当前数据库的版本不匹配，需要进行升降级操作
+      // 当数据库存在并假定版本为1时，将其升级为2版本
+      if (store.version != 3 && store.version == 1) {
+        store.executeSql(DatabaseConfig.TODO_TABLE.update1to3);
+        store.version = 2;
+      }
+
+      // 当数据库存在并假定版本为2时，将其升级为3版本
+      if (store.version != 3 && store.version == 2) {
+        store.executeSql(DatabaseConfig.TODO_TABLE.update2to3);
+        store.version = 3;
+      }
+    })
+
+    if (callback) callback()
+  }
+
+  async insertData(data: TodoData) {
+    return await this.todoTable.insertData(generateBucket(data));
+  }
+
+  async updateData(data: TodoData) {
+    const valueBucket = generateBucket(data)
+    const predicates = new relationalStore.RdbPredicates(DatabaseConfig.TODO_TABLE.tableName)
+    predicates.equalTo('id', data.id)
+
+    return await this.todoTable.updateData(predicates, valueBucket)
+  }
+
+  async deleteData(data: TodoData) {
+    const predicates = new relationalStore.RdbPredicates(DatabaseConfig.TODO_TABLE.tableName);
+    predicates.equalTo('id', data.id);
+
+    return await this.todoTable.deleteData(predicates);
+  }
+
+  async query(content: string) {
+    const predicates = new relationalStore.RdbPredicates(DatabaseConfig.TODO_TABLE.tableName)
+    predicates.contains('content', content)
+
+    return await this.todoTable.query(predicates, (_, resSet: relationalStore.ResultSet): TodoData => {
+      return {
+        id: resSet.getLong(resSet.getColumnIndex('id')),
+        status: resSet.getLong(resSet.getColumnIndex('status')),
+        content: resSet.getString(resSet.getColumnIndex('content')),
+      }
+    })
+  }
+}
+
+
+function generateBucket(account: TodoData) {
+  let obj = {};
+  DatabaseConfig.TODO_TABLE.columns.forEach((item) => {
+    if (item != 'id') {
+      obj[item] = account[item];
+    }
+  });
+  return obj;
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/common/types/Todo.ets b/entry/src/main/ets/common/types/Todo.ets
new file mode 100644
index 0000000..44df687
--- /dev/null
+++ b/entry/src/main/ets/common/types/Todo.ets
@@ -0,0 +1,5 @@
+export interface TodoData {
+  id: number,
+  status: number,
+  content: string,
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/entryability/EntryAbility.ets b/entry/src/main/ets/entryability/EntryAbility.ets
index 7af2367..21bb7d5 100644
--- a/entry/src/main/ets/entryability/EntryAbility.ets
+++ b/entry/src/main/ets/entryability/EntryAbility.ets
@@ -6,6 +6,8 @@ import window from '@ohos.window';
 
 export default class EntryAbility extends UIAbility {
   onCreate(want: Want, launchParam: AbilityConstant.LaunchParam) {
+
+
     hilog.info(0x0000, 'testTag', '%{public}s', 'Ability onCreate');
   }
 
diff --git a/entry/src/main/ets/pages/TodoPage.ets b/entry/src/main/ets/pages/TodoPage.ets
new file mode 100644
index 0000000..f1d22e9
--- /dev/null
+++ b/entry/src/main/ets/pages/TodoPage.ets
@@ -0,0 +1,19 @@
+/**
+ * Database apply demo
+ */
+@Entry
+@Component
+struct Todo {
+  @State message: string = "This a Template Project"
+
+  build() {
+    Row() {
+      Text(this.message)
+        .fontSize(40)
+        .fontWeight(FontWeight.Bold)
+    }
+    .height('100%')
+    .width('100%')
+    .justifyContent(FlexAlign.Center)
+  }
+}
diff --git a/entry/src/main/ets/utils/ConsoleLogger.ets b/entry/src/main/ets/utils/ConsoleLogger.ets
new file mode 100644
index 0000000..e895856
--- /dev/null
+++ b/entry/src/main/ets/utils/ConsoleLogger.ets
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Licensed under the Apache License,Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { ILogger } from './ILogger';
+
+export class ConsoleLogger implements ILogger {
+  private appIdentifier: string;
+
+  constructor(appIdentifier: string) {
+    this.appIdentifier = appIdentifier;
+  }
+
+  public verbose(tag: string, msg: string): void {
+    console.log(`[${this.appIdentifier}] [verbose] tag:${tag} msg:${msg}`);
+  }
+
+  public debug(tag: string, msg: string): void {
+    console.debug(`[${this.appIdentifier}] [debug] tag:${tag} msg:${msg}`);
+  }
+
+  public info(tag: string, msg: string): void {
+    console.info(`[${this.appIdentifier}] [info] tag:${tag} msg:${msg}`);
+  }
+
+  public warn(tag: string, msg: string): void {
+    console.warn(`[${this.appIdentifier}] [warn] tag:${tag} msg:${msg}`);
+  }
+
+  public error(tag: string, msg: string): void {
+    console.error(`[${this.appIdentifier}] [error] tag:${tag} msg:${msg}`);
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/utils/HiLogger.ets b/entry/src/main/ets/utils/HiLogger.ets
new file mode 100644
index 0000000..2212aeb
--- /dev/null
+++ b/entry/src/main/ets/utils/HiLogger.ets
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Licensed under the Apache License,Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import hilog from '@ohos.hilog';
+import { ILogger } from './ILogger';
+
+export class HiLogger implements ILogger {
+  private appIdentifier: string;
+  private appDomain: number = 0x0001;
+
+  constructor(appIdentifier: string) {
+    this.appIdentifier = appIdentifier;
+  }
+
+  public verbose(tag: string, msg: string): void {
+    hilog.debug(this.appDomain, tag, `[${this.appIdentifier}] [verbose] tag:${tag} msg:${msg}`);
+  }
+
+  public debug(tag: string, msg: string): void {
+    hilog.debug(this.appDomain, tag, `[${this.appIdentifier}] [debug] tag:${tag} msg:${msg}`);
+  }
+
+  public info(tag: string, msg: string): void {
+    hilog.info(this.appDomain, tag, `[${this.appIdentifier}] [info] tag:${tag} msg:${msg}`);
+  }
+
+  public warn(tag: string, msg: string): void {
+    hilog.warn(this.appDomain, tag, `[${this.appIdentifier}] [warn] tag:${tag} msg:${msg}`);
+  }
+
+  public error(tag: string, msg: string): void {
+    hilog.error(this.appDomain, tag, `[${this.appIdentifier}] [error] tag:${tag} msg:${msg}`);
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/utils/ILogger.ets b/entry/src/main/ets/utils/ILogger.ets
new file mode 100644
index 0000000..641294d
--- /dev/null
+++ b/entry/src/main/ets/utils/ILogger.ets
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Licensed under the Apache License,Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export interface ILogger {
+  verbose(tag: string, msg: string): void;
+
+  debug(tag: string, msg: string): void;
+
+  info(tag: string, msg: string): void;
+
+  warn(tag: string, msg: string): void;
+
+  error(tag: string, msg: string): void;
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/utils/Logger.ets b/entry/src/main/ets/utils/Logger.ets
new file mode 100644
index 0000000..3282193
--- /dev/null
+++ b/entry/src/main/ets/utils/Logger.ets
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Licensed under the Apache License,Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { ILogger } from './ILogger';
+import { HiLogger } from './HiLogger';
+import { ConsoleLogger } from './ConsoleLogger';
+
+export class Logger implements ILogger {
+  private static isAppDebugMode: boolean = true;
+  private static appIdentifier: string = 'RDB';
+
+  // if true, use a ConsoleLogger, or HiLogger otherwise
+  private static useConsoleLogger: boolean = true;
+
+  public static verbose(tag: string, msg: string): void {
+    if (Logger.isAppDebugMode) {
+      Logger.getInstance().verbose(tag, msg);
+    }
+  }
+
+  public static debug(tag: string, msg: string): void {
+    if (Logger.isAppDebugMode) {
+      Logger.getInstance().debug(tag, msg);
+    }
+  }
+
+  public static info(tag: string, msg: string): void {
+    if (Logger.isAppDebugMode) {
+      Logger.getInstance().info(tag, msg);
+    }
+  }
+
+  public static warn(tag: string, msg: string): void {
+    if (Logger.isAppDebugMode) {
+      Logger.getInstance().warn(tag, msg);
+    }
+  }
+
+  public static error(tag: string, msg: string): void {
+    if (Logger.isAppDebugMode) {
+      Logger.getInstance().error(tag, msg);
+    }
+  }
+
+  private static logger: ILogger;
+
+  private constructor() {
+  }
+
+  public static getInstance(): Logger {
+    if (!Logger.logger) {
+      Logger.logger = Logger.useConsoleLogger
+        ? new ConsoleLogger(Logger.appIdentifier)
+        : new HiLogger(Logger.appIdentifier);
+    }
+
+    return Logger.logger;
+  }
+
+  public verbose(tag: string, msg: string): void {
+    Logger.logger.verbose(tag, msg);
+  }
+
+  public debug(tag: string, msg: string): void {
+    Logger.debug(tag, msg);
+  }
+
+  public info(tag: string, msg: string): void {
+    Logger.info(tag, msg);
+  }
+
+  public warn(tag: string, msg: string): void {
+    Logger.warn(tag, msg);
+  }
+
+  public error(tag: string, msg: string): void {
+    Logger.error(tag, msg);
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/resources/base/profile/main_pages.json b/entry/src/main/resources/base/profile/main_pages.json
index 1898d94..b8e34aa 100644
--- a/entry/src/main/resources/base/profile/main_pages.json
+++ b/entry/src/main/resources/base/profile/main_pages.json
@@ -1,5 +1,6 @@
 {
   "src": [
-    "pages/Index"
+    "pages/Index",
+    "pages/TodoPage"
   ]
 }
diff --git a/oh-package.json5 b/oh-package.json5
index dbc2e2d..1a9cfc5 100644
--- a/oh-package.json5
+++ b/oh-package.json5
@@ -9,5 +9,5 @@
   },
   "devDependencies": {
     "@ohos/hypium": "1.0.6"
-  }
+  },
 }