diff --git a/packages-user/data-base/src/flag/field.ts b/packages-user/data-base/src/flag/field.ts
new file mode 100644
index 0000000..b21e4aa
--- /dev/null
+++ b/packages-user/data-base/src/flag/field.ts
@@ -0,0 +1,43 @@
+import { IFlagCommonField, IFlagSystem } from './types';
+import { logger } from '@motajs/common';
+
+export class FlagCommonField<T> implements IFlagCommonField<T> {
+    readonly system: IFlagSystem;
+
+    /** Flag 当前值 */
+    private value: T;
+
+    /** 此 Flag 的键名 */
+    private readonly key: PropertyKey;
+
+    constructor(system: IFlagSystem, key: PropertyKey, value: T) {
+        this.system = system;
+        this.key = key;
+        this.value = value;
+    }
+
+    set(value: T): void {
+        this.value = value;
+    }
+
+    add(value: number): void {
+        if (typeof this.value !== 'number') {
+            logger.warn(111, String(this.key));
+            return;
+        }
+        // @ts-expect-error T 已通过运行时检查确认为 number
+        this.value += value;
+    }
+
+    get(): T {
+        return this.value;
+    }
+
+    toStructured(): any {
+        return structuredClone(this.value);
+    }
+
+    fromStructured(data: any): void {
+        this.value = structuredClone(data) as T;
+    }
+}
diff --git a/packages-user/data-base/src/flag/index.ts b/packages-user/data-base/src/flag/index.ts
new file mode 100644
index 0000000..86c5128
--- /dev/null
+++ b/packages-user/data-base/src/flag/index.ts
@@ -0,0 +1,3 @@
+export * from './field';
+export * from './system';
+export * from './types';
diff --git a/packages-user/data-base/src/flag/system.ts b/packages-user/data-base/src/flag/system.ts
new file mode 100644
index 0000000..7063691
--- /dev/null
+++ b/packages-user/data-base/src/flag/system.ts
@@ -0,0 +1,73 @@
+import { IFlagCommonField, IFlagSystem, IFlagSystemSave } from './types';
+import { FlagCommonField } from './field';
+
+export class FlagSystem implements IFlagSystem {
+    private readonly fieldMap: Map<PropertyKey, FlagCommonField<any>> =
+        new Map();
+
+    occupied(field: PropertyKey): boolean {
+        return this.fieldMap.has(field);
+    }
+
+    insertField<T>(field: PropertyKey, value: T): IFlagCommonField<T> {
+        return this.getOrInsert(field, value);
+    }
+
+    getField<T>(field: PropertyKey): IFlagCommonField<T> | null {
+        return this.fieldMap.get(field) ?? null;
+    }
+
+    getOrInsert<T>(field: PropertyKey, defaultValue: T): IFlagCommonField<T> {
+        return this.fieldMap.getOrInsertComputed(
+            field,
+            () => new FlagCommonField<T>(this, field, defaultValue)
+        );
+    }
+
+    getOrInsertComputed<K extends PropertyKey, T>(
+        field: K,
+        defaultValue: (field: K) => T
+    ): IFlagCommonField<T> {
+        return this.fieldMap.getOrInsertComputed(
+            field,
+            () => new FlagCommonField<T>(this, field, defaultValue(field))
+        );
+    }
+
+    deleteField(field: PropertyKey): void {
+        this.fieldMap.delete(field);
+    }
+
+    setFieldValue(field: PropertyKey, value: any): void {
+        this.getOrInsert(field, value).set(value);
+    }
+
+    addFieldValue(field: PropertyKey, value: number): void {
+        this.getOrInsert(field, 0).add(value);
+    }
+
+    getFieldValue<T>(field: PropertyKey): T | undefined {
+        return this.fieldMap.get(field)?.get();
+    }
+
+    getFieldValueDefaults<T>(field: PropertyKey, defaultValue: T): T {
+        return this.getOrInsert(field, defaultValue).get();
+    }
+
+    saveState(): IFlagSystemSave {
+        const fields: Map<PropertyKey, any> = new Map();
+        for (const [key, field] of this.fieldMap) {
+            fields.set(key, field.toStructured());
+        }
+        return { fields };
+    }
+
+    loadState(state: IFlagSystemSave): void {
+        this.fieldMap.clear();
+        for (const [key, data] of state.fields) {
+            const field = new FlagCommonField<unknown>(this, key, undefined);
+            field.fromStructured(data);
+            this.fieldMap.set(key, field);
+        }
+    }
+}
diff --git a/packages-user/data-base/src/flag/types.ts b/packages-user/data-base/src/flag/types.ts
new file mode 100644
index 0000000..7f77a28
--- /dev/null
+++ b/packages-user/data-base/src/flag/types.ts
@@ -0,0 +1,147 @@
+//#region 字段
+
+export interface IFlagCommonField<T> {
+    /** 此字段所处的 Flag 系统 */
+    readonly system: IFlagSystem;
+
+    /**
+     * 设置此字段的值
+     * @param value 要设置为的值
+     */
+    set(value: T): void;
+
+    /**
+     * 增减此字段的值，如果此字段的当前值不是数字，那么会抛出警告
+     * @param value 增减值
+     */
+    add(value: number): void;
+
+    /**
+     * 获取此字段的值
+     */
+    get(): T;
+
+    /**
+     * 转换为可结构化存储的数据
+     */
+    toStructured(): any;
+
+    /**
+     * 从结构化存储数据中读取数据
+     * @param data 结构化存储数据
+     */
+    fromStructured(data: any): void;
+}
+
+//#endregion
+
+//#region 系统
+
+export interface IFlagSystemSave {
+    /** 每个字段的值，值为 {@link IFlagCommonField.toStructured} 方法输出 */
+    readonly fields: Map<PropertyKey, any>;
+}
+
+export interface IFlagSystem {
+    /**
+     * 判断一个字段是否被占用，类似于旧样板的 `core.hasFlag`
+     * @param field 字段名称
+     */
+    occupied(field: PropertyKey): boolean;
+
+    /**
+     * 以指定值插入字段
+     * @param field 字段名称
+     * @param value 字段值
+     */
+    insertField<T>(field: PropertyKey, value: T): IFlagCommonField<T>;
+
+    /**
+     * 获取指定字段对象
+     * @param field 字段名称
+     */
+    getField<T>(field: PropertyKey): IFlagCommonField<T> | null;
+
+    /**
+     * 获取指定字段，如果字段不存在则以 `defaultValue` 创建字段。
+     * 如果默认值计算量较大，建议使用 {@link getOrInsertComputed} 方法。
+     * @param field 字段名称
+     * @param defaultValue 字段默认值
+     */
+    getOrInsert<T>(field: PropertyKey, defaultValue: T): IFlagCommonField<T>;
+
+    /**
+     * 获取指定字段，如果字段不存在则以 `defaultValue` 创建字段。
+     * 如果字段不存在则不会执行 `defaultValue` 函数，如果默认值计算量大，建议使用此方法。
+     * @param field 字段名称
+     * @param defaultValue 字段默认值函数
+     */
+    getOrInsertComputed<K extends PropertyKey, T>(
+        field: K,
+        defaultValue: (field: K) => T
+    ): IFlagCommonField<T>;
+
+    /**
+     * 删除指定字段
+     * @param field 字段名称
+     */
+    deleteField(field: PropertyKey): void;
+
+    /**
+     * 设置字段的值，类似于旧样板的 `core.setFlag`，等同于如下代码：
+     * ```ts
+     * const field = flagSystem.getField(name);
+     * field.set(value);
+     * ```
+     * @param field 字段名称
+     * @param value 要设置为的值
+     */
+    setFieldValue(field: PropertyKey, value: any): void;
+
+    /**
+     * 对字段的值进行增减操作，如果字段的值不是数字，那么会抛出警告。
+     * 类似于旧样板的 `core.addFlag`，等同于如下代码：
+     * ```ts
+     * const field = flagSystem.getField(name);
+     * field.add(value);
+     * ```
+     * @param field 字段名称
+     * @param value 字段增减值
+     */
+    addFieldValue(field: PropertyKey, value: number): void;
+
+    /**
+     * 获取指定字段的值，类似于旧样板的 `core.getFlag`，但是没有默认值，
+     * 如果需要默认值使用 {@link getFieldValueDefaults} 等方法。等同于如下代码：
+     * ```ts
+     * flagSystem.getField(name)?.get();
+     * ```
+     * @param field 字段名称
+     */
+    getFieldValue<T>(field: PropertyKey): T | undefined;
+
+    /**
+     * 获取字段的值，如果字段不存在会返回默认值，并以默认值创建新字段，
+     * 类似于旧样板的 `core.getFlag`，且包含默认值，等同于如下代码：
+     * ```ts
+     * const field = flagSystem.getOrInsert(name, defaultValue);
+     * return field.get();
+     * ```
+     * @param field 字段名称
+     * @param defaultValue 字段默认值
+     */
+    getFieldValueDefaults<T>(field: PropertyKey, defaultValue: T): T;
+
+    /**
+     * 对 Flag 系统进行结构化复制，形成存档对象
+     */
+    saveState(): IFlagSystemSave;
+
+    /**
+     * 从指定存档对象读取信息
+     * @param state 存档对象
+     */
+    loadState(state: IFlagSystemSave): void;
+}
+
+//#endregion
diff --git a/packages-user/data-base/src/game.ts b/packages-user/data-base/src/game.ts
index 12187a0..66745cc 100644
--- a/packages-user/data-base/src/game.ts
+++ b/packages-user/data-base/src/game.ts
@@ -143,6 +143,8 @@ export interface GameEvent {
     replayStatus: [replaying: boolean];
     /** 当加载存档时触发，Emitted in project/functions.js */
     loadData: [];
+    /** 当重设 `core.status.hero` 时触发 */
+    resetHero: [hero: any];
 }
 
 export const hook = new EventEmitter<GameEvent>();
diff --git a/packages-user/data-base/src/index.ts b/packages-user/data-base/src/index.ts
index 4cbfdc8..4994172 100644
--- a/packages-user/data-base/src/index.ts
+++ b/packages-user/data-base/src/index.ts
@@ -1,5 +1,6 @@
 export * from './common';
 export * from './enemy';
+export * from './flag';
 export * from './hero';
 export * from './load';
 
diff --git a/packages-user/data-fallback/src/flag.ts b/packages-user/data-fallback/src/flag.ts
new file mode 100644
index 0000000..7f5c05d
--- /dev/null
+++ b/packages-user/data-fallback/src/flag.ts
@@ -0,0 +1,38 @@
+import { logger } from '@motajs/common';
+import { Patch, PatchClass } from '@motajs/legacy-common';
+import { ICoreState } from '@user/data-state';
+
+/**
+ * Flag 系统 patch
+ */
+export function patchFlags(state: ICoreState) {
+    const patch = new Patch(PatchClass.Control);
+    const flags = state.flags;
+    patch.add('setFlag', (name, value) => {
+        logger.warn(56, 'core.setFlag', 'IFlagSystem');
+        if (value === null || value === undefined) {
+            flags.deleteField(name);
+        } else {
+            flags.setFieldValue(name, value);
+        }
+    });
+    patch.add('getFlag', <T>(name: string, defaultValue?: T) => {
+        logger.warn(56, 'core.getFlag', 'IFlagSystem');
+        if (defaultValue === undefined) {
+            return flags.getFieldValue<T>(name);
+        } else {
+            return flags.getFieldValueDefaults(name, defaultValue);
+        }
+    });
+    patch.add('addFlag', (name, value) => {
+        logger.warn(56, 'core.addFlag', 'IFlagSystem');
+        if (typeof value !== 'number') return;
+        flags.addFieldValue(name, value);
+    });
+    patch.add('hasFlag', name => {
+        return flags.occupied(name);
+    });
+    patch.add('removeFlag', name => {
+        flags.deleteField(name);
+    });
+}
diff --git a/packages-user/data-fallback/src/hero.ts b/packages-user/data-fallback/src/hero.ts
new file mode 100644
index 0000000..d889bc3
--- /dev/null
+++ b/packages-user/data-fallback/src/hero.ts
@@ -0,0 +1,37 @@
+import { logger } from '@motajs/common';
+import { hook } from '@user/data-base';
+import { ICoreState } from '@user/data-state';
+
+export function patchHero(state: ICoreState) {
+    hook.on('resetHero', hero => {
+        // patch 旧样板的 core.status.hero，主要是为编辑器服务的
+        const attr = state.hero.getModifiableAttribute();
+        const proxy = new Proxy(hero, {
+            set(target, p, newValue) {
+                target[p] = newValue;
+                // @ts-expect-error 旧样板无法处理此类型
+                attr.setBaseAttribute(p, newValue);
+                return true;
+            },
+            get(_, p) {
+                // @ts-expect-error 旧样板无法处理此类型
+                return attr.getBaseAttribute(p);
+            }
+        });
+        core.status.hero = proxy;
+
+        // 不允许再使用旧样板的 flags 接口
+        const flagsProxy = new Proxy(core.status.hero.flags, {
+            set() {
+                logger.error(54);
+                return false;
+            },
+            get() {
+                logger.error(54);
+                return undefined;
+            }
+        });
+        core.status.hero.flags = flagsProxy;
+        window.flags = flagsProxy;
+    });
+}
diff --git a/packages-user/data-fallback/src/index.ts b/packages-user/data-fallback/src/index.ts
index a496d29..525aaa6 100644
--- a/packages-user/data-fallback/src/index.ts
+++ b/packages-user/data-fallback/src/index.ts
@@ -1,7 +1,12 @@
+import { ICoreState } from '@user/data-state';
 import { patchBattle } from './battle';
 import { patchDamage } from './damage';
+import { patchFlags } from './flag';
+import { patchHero } from './hero';
 
-export function patchAll() {
+export function patchAll(state: ICoreState) {
     patchBattle();
     patchDamage();
+    patchFlags(state);
+    patchHero(state);
 }
diff --git a/packages-user/data-state/src/core.ts b/packages-user/data-state/src/core.ts
index 3dd7db7..63b4527 100644
--- a/packages-user/data-state/src/core.ts
+++ b/packages-user/data-state/src/core.ts
@@ -11,7 +11,9 @@ import {
     MapDamage,
     HeroAttribute,
     HeroState,
-    IHeroState
+    IHeroState,
+    IFlagSystem,
+    FlagSystem
 } from '@user/data-base';
 import { IEnemyAttr } from './enemy/types';
 import {
@@ -28,16 +30,18 @@ import { HERO_DEFAULT_ATTRIBUTE, TILE_HEIGHT, TILE_WIDTH } from './shared';
 import { IHeroAttr } from './hero';
 
 export class CoreState implements ICoreState {
-    readonly layer: ILayerState;
     readonly roleFace: IRoleFaceBinder;
     readonly idNumberMap: Map<string, number>;
     readonly numberIdMap: Map<number, string>;
 
+    readonly layer: ILayerState;
     readonly hero: IHeroState<IHeroAttr>;
 
     readonly enemyManager: IEnemyManager<IEnemyAttr>;
     readonly enemyContext: IEnemyContext<IEnemyAttr, IHeroAttr>;
 
+    readonly flags: IFlagSystem;
+
     constructor() {
         this.layer = new LayerState();
         this.roleFace = new RoleFaceBinder();
@@ -82,6 +86,12 @@ export class CoreState implements ICoreState {
         this.enemyContext = enemyContext;
 
         //#endregion
+
+        //#region 其他初始化
+
+        this.flags = new FlagSystem();
+
+        //#endregion
     }
 
     saveState(): IStateSaveData {
diff --git a/packages-user/data-state/src/index.ts b/packages-user/data-state/src/index.ts
index 6df88ec..ee87910 100644
--- a/packages-user/data-state/src/index.ts
+++ b/packages-user/data-state/src/index.ts
@@ -70,8 +70,11 @@ export function create() {
 export const state = new CoreState();
 
 export * from './common';
-export * from './core';
 export * from './enemy';
 export * from './hero';
-export * from './map';
 export * from './legacy';
+export * from './map';
+
+export * from './core';
+export * from './shared';
+export * from './types';
diff --git a/packages-user/data-state/src/types.ts b/packages-user/data-state/src/types.ts
index 92f4328..ff5860a 100644
--- a/packages-user/data-state/src/types.ts
+++ b/packages-user/data-state/src/types.ts
@@ -8,6 +8,7 @@ import {
 } from '@user/data-base';
 import { IEnemyAttr } from './enemy/types';
 import { IHeroAttr } from './hero';
+import { IFlagSystem } from '../../data-base/src/flag/types';
 
 export interface IGameDataState {
     /** 怪物管理器 */
@@ -20,10 +21,6 @@ export interface IStateSaveData {
 }
 
 export interface ICoreState {
-    /** 地图状态 */
-    readonly layer: ILayerState;
-    /** 勇士状态 */
-    readonly hero: IHeroState<IHeroAttr>;
     /** 朝向绑定 */
     readonly roleFace: IRoleFaceBinder;
     /** id 到图块数字的映射 */
@@ -31,11 +28,19 @@ export interface ICoreState {
     /** 图块数字到 id 的映射 */
     readonly numberIdMap: Map<number, string>;
 
+    /** 地图状态 */
+    readonly layer: ILayerState;
+    /** 勇士状态 */
+    readonly hero: IHeroState<IHeroAttr>;
+
     /** 怪物管理器 */
     readonly enemyManager: IEnemyManager<IEnemyAttr>;
     /** 怪物上下文 */
     readonly enemyContext: IEnemyContext<IEnemyAttr, IHeroAttr>;
 
+    /** Flag 系统 */
+    readonly flags: IFlagSystem;
+
     /**
      * 保存状态
      */
diff --git a/packages/common/src/logger.json b/packages/common/src/logger.json
index 08415b7..e58e476 100644
--- a/packages/common/src/logger.json
+++ b/packages/common/src/logger.json
@@ -53,6 +53,7 @@
         "51": "Animatable object cannot be animated by plans with the same start time.",
         "52": "To get divider payload, an excitation binding is expected.",
         "53": "Expected serializable value set as enemy's default attribute.",
+        "54": "Legacy flags API has been removed, consider using new APIs.",
         "1201": "Floor-damage extension needs 'floor-binder' extension as dependency."
     },
     "warn": {
@@ -166,6 +167,7 @@
         "108": "Hero modifier '$1' has already been added once. Ignore repeated add for attribute '$2'.",
         "109": "Expected a different object reference returned, but got a same reference at modifier '$1' for property '$2'.",
         "110": "Expected a hero attribute binding before executing any enemy context calculation.",
+        "111": "Cannot add value to flag field '$1', since the current value is not a number.",
         "1001": "Item-detail extension needs 'floor-binder' and 'floor-damage' extension as dependency."
     }
 }
diff --git a/public/libs/control.js b/public/libs/control.js
index d071a7c..611d726 100644
--- a/public/libs/control.js
+++ b/public/libs/control.js
@@ -2524,33 +2524,27 @@ control.prototype.getNextLvUpNeed = function () {
 
 ////// 设置某个自定义变量或flag //////
 control.prototype.setFlag = function (name, value) {
-    if (value == null) return this.removeFlag(name);
-    if (!core.status.hero) return;
-    core.status.hero.flags[name] = value;
+    // Deprecated. See packages-user/data-fallback/src/flag.ts
 };
 
 ////// 增加某个flag数值 //////
 control.prototype.addFlag = function (name, value) {
-    if (!core.status.hero) return;
-    core.setFlag(name, core.getFlag(name, 0) + value);
+    // Deprecated. See packages-user/data-fallback/src/flag.ts
 };
 
 ////// 获得某个自定义变量或flag //////
 control.prototype.getFlag = function (name, defaultValue) {
-    if (!core.status.hero) return defaultValue;
-    var value = core.status.hero.flags[name];
-    return value != null ? value : defaultValue;
+    // Deprecated. See packages-user/data-fallback/src/flag.ts
 };
 
 ////// 是否存在某个自定义变量或flag，且值为true //////
 control.prototype.hasFlag = function (name) {
-    return !!core.getFlag(name);
+    // Deprecated. See packages-user/data-fallback/src/flag.ts
 };
 
 ////// 删除某个自定义变量或flag //////
 control.prototype.removeFlag = function (name) {
-    if (!core.status.hero) return;
-    delete core.status.hero.flags[name];
+    // Deprecated. See packages-user/data-fallback/src/flag.ts
 };
 
 ////// 获得某个点的独立开关 //////
diff --git a/src/types/declaration/control.d.ts b/src/types/declaration/control.d.ts
index d5f985b..6789f65 100644
--- a/src/types/declaration/control.d.ts
+++ b/src/types/declaration/control.d.ts
@@ -833,7 +833,8 @@ interface Control {
      * @param defaultValue 当变量不存在时的返回值，可选（事件流中默认填0）。
      * @returns flags[name] ?? defaultValue
      */
-    getFlag<T>(name: string, defaultValue?: T): T;
+    getFlag<T>(name: string): T | undefined;
+    getFlag<T>(name: string, defaultValue: T): T;
 
     /**
      * @deprecated 可使用，暂时没有替代接口\