diff --git a/api/@ohos.arkui.StateManagement.d.ts b/api/@ohos.arkui.StateManagement.d.ts
new file mode 100644
index 000000000..008b9cb75
--- /dev/null
+++ b/api/@ohos.arkui.StateManagement.d.ts
@@ -0,0 +1,170 @@
+/*
+ * Copyright (C) 2024 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.
+ */
+
+/**
+ * @file
+ * @kit ArkUI
+ */
+
+/**
+ * Function that returns default creator.
+ *
+ * @typedef { function } StorageDefaultCreator<T>
+ * @returns { T } default creator
+ * @syscap SystemCapability.ArkUI.ArkUI.Full
+ * @crossplatform
+ * @atomicservice
+ * @since 12
+ */
+export declare type StorageDefaultCreator<T> = () => T;
+
+/**
+ * AppStorageV2 is for UI state of app-wide access, has same life cycle as the app,
+ * and saves database content only in memory.
+ *
+ * @syscap SystemCapability.ArkUI.ArkUI.Full
+ * @crossplatform
+ * @atomicservice
+ * @since 12
+ */
+export declare class AppStorageV2 {
+  /**
+   * If the value for the given key is already available, return the value.
+   * If not, add the key with value generated by calling defaultFunc and return it to caller.
+   *
+   * @param { string } key key adding
+   * @param { StorageDefaultCreator<T> } [defaultCreator] the function generating the default value
+   * @returns { T | undefined } the value of the existed key or the default value
+   * @syscap SystemCapability.ArkUI.ArkUI.Full
+   * @crossplatform
+   * @atomicservice
+   * @since 12
+   */
+  static connect<T extends object>(key: string, defaultCreator?: StorageDefaultCreator<T>): T | undefined;
+
+  /**
+   * Removes the given key. Return false if the given key does not exist.
+   *
+   * @param { string } key key removing
+   * @returns { boolean } exist or not
+   * @syscap SystemCapability.ArkUI.ArkUI.Full
+   * @crossplatform
+   * @atomicservice
+   * @since 12
+   */
+  static remove(key: string): boolean;
+
+  /**
+   * Return the array of all keys.
+   *
+   * @returns { Array<string> } the array of all keys
+   * @syscap SystemCapability.ArkUI.ArkUI.Full
+   * @crossplatform
+   * @atomicservice
+   * @since 12
+   */
+  static keys() : Array<string>
+}
+
+/**
+ * Function that returns reason type when error.
+ *
+ * @typedef { function } PersistenceErrorCallback
+ * @param { string } key persisted key when error
+ * @param { "quota" | "serialization" | "unknown" } reason reason type when error
+ * @param { string } message more message when error
+ * @syscap SystemCapability.ArkUI.ArkUI.Full
+ * @crossplatform
+ * @atomicservice
+ * @since 12
+ */
+export declare type PersistenceErrorCallback = (key: string, reason: "quota" | "serialization" | "unknown", message: string) => void;
+
+/**
+ * PersistenceV2 is for UI state of app-wide access, available on app re-start,
+ * and saves database content in disk.
+ *
+ * @extends AppStorageV2
+ * @syscap SystemCapability.ArkUI.ArkUI.Full
+ * @crossplatform
+ * @atomicservice
+ * @since 12
+ */
+export declare class PersistenceV2 extends AppStorageV2 {
+  /**
+   * The purpose of the save function is request to persist non-observed object changes.
+   *
+   * @param { string } key key need to save, that persist non-observed object changes
+   * @syscap SystemCapability.ArkUI.ArkUI.Full
+   * @crossplatform
+   * @atomicservice
+   * @since 12
+   */
+  static save(key: string): void;
+
+  /**
+   * Be called when persisting has encountered an error.
+   *
+   * @param { PersistenceErrorCallback | undefined } callback called when error
+   * @syscap SystemCapability.ArkUI.ArkUI.Full
+   * @crossplatform
+   * @atomicservice
+   * @since 12
+   */
+  static notifyOnError(callback: PersistenceErrorCallback | undefined): void;
+}
+
+/**
+ * Define TypeConstructor type.
+ *
+ * @interface TypeConstructor<T>
+ * @syscap SystemCapability.ArkUI.ArkUI.Full
+ * @crossplatform
+ * @atomicservice
+ * @since 12
+ */
+export interface TypeConstructor<T> {
+  /**
+   * @returns { T }
+   * @syscap SystemCapability.ArkUI.ArkUI.Full
+   * @crossplatform
+   * @atomicservice
+   * @since 12
+   */
+  new(): T;
+}
+
+/**
+ * Function that returns PropertyDecorator.
+ *
+ * @typedef { function } TypeDecorator
+ * @param { TypeConstructor<T> } type type info
+ * @returns { PropertyDecorator } Type decorator
+ * @syscap SystemCapability.ArkUI.ArkUI.Full
+ * @crossplatform
+ * @atomicservice
+ * @since 12
+ */
+export declare type TypeDecorator = <T>(type: TypeConstructor<T>) => PropertyDecorator;
+
+/**
+ * Define Type PropertyDecorator, adds type information to an object.
+ *
+ * @syscap SystemCapability.ArkUI.ArkUI.Full
+ * @crossplatform
+ * @atomicservice
+ * @since 12
+ */
+export declare const Type: TypeDecorator;
diff --git a/kits/@kit.ArkUI.d.ts b/kits/@kit.ArkUI.d.ts
index b9c7bbcd5..90d3e6cec 100644
--- a/kits/@kit.ArkUI.d.ts
+++ b/kits/@kit.ArkUI.d.ts
@@ -114,6 +114,7 @@ import {
   PresetSplitRatio,
   FoldSplitContainer,
 } from '@ohos.arkui.advanced.FoldSplitContainer';
+import { AppStorageV2, PersistenceV2, Type } from '@ohos.arkui.StateManagement';
 
 export {
   AddFormMenuItem, AddFormOptions, AlertDialog, Animator, AnimatorOptions, AnimatorResult, App, AppResponse, AtomicServiceBar,
@@ -142,5 +143,6 @@ export {
   screen, screenshot, uiAppearance, uiExtensionHost, uiObserver, window, windowAnimationManager, CustomContentDialog,
   IconOptions, ChipItemLabelOptions, ChipGroupItemOptions, ChipItemStyle, ChipGroupSpaceOptions, IconItemOptions, IconGroupSuffix, ChipGroup,
   SymbolGlyphModifier, Colors, CustomColors, Theme, ThemeControl, CustomTheme, ChipSymbolGlyphOptions,
-  ExtraRegionPosition, ExpandedRegionLayoutOptions, SemiFoldedRegionLayoutOptions, FoldedRegionLayoutOptions, PresetSplitRatio, FoldSplitContainer
+  ExtraRegionPosition, ExpandedRegionLayoutOptions, SemiFoldedRegionLayoutOptions, FoldedRegionLayoutOptions, PresetSplitRatio, FoldSplitContainer,
+  AppStorageV2, PersistenceV2, Type
 };