diff --git a/api/@ohos.web.d.ts b/api/@ohos.web.d.ts
new file mode 100644
index 0000000000000000000000000000000000000000..3d462d0bfa3321f2825f775988177889dc08cf3f
--- /dev/null
+++ b/api/@ohos.web.d.ts
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2021-2022 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 {AsyncCallback} from "./basic";
+
+/**
+ * This module provides the capability to manage web modules.
+ *
+ * @since 9
+ * @syscap SystemCapability.Web
+ */
+declare namespace web {
+    /**
+     * Provides basic information of web storage.
+     * @name WebStorageOrigin
+     * @since 9
+     * @syscap SystemCapability.Web
+     */
+    interface WebStorageOrigin {
+        origin: string;
+        usage: number;
+        quota: number;
+    }
+
+    /**
+     * Provides methods for managing web storage.
+     * @name WebStorage
+     * @since 9
+     * @syscap SystemCapability.Web
+     */
+    class WebStorage {
+        /**
+         * delete all the storage data.
+         *
+         * @since 9
+         */
+        static deleteAllData() : void;
+    
+        /**
+         * delete the storage data with the origin.
+         * @param origin the origin which to be deleted.
+         * @since 9
+         */
+        static deleteOrigin(origin : string): void;
+
+        /**
+         * Get current all the web storage origins.
+         *
+         * @since 9
+         */
+        static getOrigins() : Promise<Array<WebStorageOrigin>>;
+        static getOrigins(callback: AsyncCallback<Array<WebStorageOrigin>>) : void;
+
+        /**
+         *  Get the web storage quota with the origin.
+         * @param origin the origin which to be inquired.
+         * @since 9
+         */
+        static getOriginQuota(origin : string) : Promise<number>;
+        static getOriginQuota(origin : string, callback : AsyncCallback<number>) : void;
+
+        /**
+         *  Get the web storage quota with the origin.
+         * @param origin the origin which to be inquired.
+         * @since 9
+         */
+        static getOriginUsage(origin : string) : Promise<number> ;
+        static getOriginUsage(origin : string, callback : AsyncCallback<number>) : void;
+    }
+
+    /**
+     * Provides methods for managing web database.
+     * @name WebDataBase
+     * @since 9
+     * @syscap SystemCapability.Web
+     */
+    class WebDataBase {
+        /**
+        * Get whether instances holds any http authentication credentials.
+        * @return true if instances saved any http authentication credentials otherwise false.
+        *
+        * @since 9
+        */
+        static existHttpAuthCredentials(): boolean;
+      
+        /**
+         * delete all http authentication credentials.
+         *
+         * @since 9
+         */
+        static deleteHttpAuthCredentials(): void;
+      
+        /**
+         * get http authentication credentials.
+         * @param host the host to which the credentials apply.
+         * @param realm the realm to which the credentials apply.
+         * @return Return an array containing username and password.
+         * @since 9
+         */
+        static getHttpAuthCredentials(host: string, realm: string): Array<string>;
+      
+        /**
+         * save http authentication credentials.
+         * @param host the host to which the credentials apply.
+         * @param realm the realm to which the credentials apply.
+         * @param username the username.
+         * @param password the password.
+         *
+         * @since 9
+         */
+        static saveHttpAuthCredentials(host: string, realm: string, username: string, password: string): void;
+      }
+}
+
+export default web;
\ No newline at end of file
diff --git a/api/device-define/car.json b/api/device-define/car.json
index a832561a64dfbf985013b314f62b32ca24ef18b8..41a4eb36fee7c445167aa5eb8349c99b5eae6a8b 100644
--- a/api/device-define/car.json
+++ b/api/device-define/car.json
@@ -122,6 +122,7 @@
     "SystemCapability.Applications.ContactsData",
     "SystemCapability.Applications.Contacts",
     "SystemCapability.Applications.settings.Core",
-    "SystemCapability.Test.UiTest"
+    "SystemCapability.Test.UiTest",
+    "SystemCapability.Web"
   ]
 }
\ No newline at end of file
diff --git a/api/device-define/default.json b/api/device-define/default.json
index 121cdf64cd4425015fcd42c22b2024749e8d8c9b..e9519ff8415807973b3b74922b3af3146d8b30b4 100644
--- a/api/device-define/default.json
+++ b/api/device-define/default.json
@@ -151,6 +151,7 @@
     "SystemCapability.Applications.ContactsData",
     "SystemCapability.Applications.Contacts",
     "SystemCapability.Applications.settings.Core",
-    "SystemCapability.Test.UiTest"
+    "SystemCapability.Test.UiTest",
+    "SystemCapability.Web"
   ]
 }
diff --git a/api/device-define/tablet.json b/api/device-define/tablet.json
index c8d305174e44b25053fb904007badef46c8d4525..d447d9ba67d37ed4d11af611feac056691b0781e 100644
--- a/api/device-define/tablet.json
+++ b/api/device-define/tablet.json
@@ -150,6 +150,7 @@
     "SystemCapability.Applications.ContactsData",
     "SystemCapability.Applications.Contacts",
     "SystemCapability.Applications.settings.Core",
-    "SystemCapability.Test.UiTest"
+    "SystemCapability.Test.UiTest",
+    "SystemCapability.Web"
   ]
 }
\ No newline at end of file
diff --git a/api/device-define/tv.json b/api/device-define/tv.json
index c992e8cd6327249e7f9cff2c883a934496c09c65..e0d2755f119daa217e60c4859c2d47d21ddb3a48 100644
--- a/api/device-define/tv.json
+++ b/api/device-define/tv.json
@@ -125,6 +125,7 @@
     "SystemCapability.Ability.AbilityTools.AbilityAssistant",
     "SystemCapability.Ability.Form",
     "SystemCapability.Ability.DistributedAbilityManager",
-    "SystemCapability.Applications.settings.Core"
+    "SystemCapability.Applications.settings.Core",
+    "SystemCapability.Web"
   ]
 }
\ No newline at end of file
diff --git a/api/device-define/wearable.json b/api/device-define/wearable.json
index d312e0ae0080094784083f58c100feebf0b8b5c4..8c9289e4bc59d3bef23238a7f0732afa361d2422 100644
--- a/api/device-define/wearable.json
+++ b/api/device-define/wearable.json
@@ -127,6 +127,7 @@
     "SystemCapability.Ability.DistributedAbilityManager",
     "SystemCapability.Applications.ContactsData",
     "SystemCapability.Applications.Contacts",
-    "SystemCapability.Applications.settings.Core"
+    "SystemCapability.Applications.settings.Core",
+    "SystemCapability.Web"
   ]
 }
\ No newline at end of file