diff --git a/server/models/user/user.ts b/server/models/user/user.ts
index db5371c8..635d6806 100644
--- a/server/models/user/user.ts
+++ b/server/models/user/user.ts
@@ -100,6 +100,12 @@ export class User extends TimeStamps implements Base {
   })
   type: UserType;
 
+  /**
+   * 用户的额外信息
+   */
+  @prop()
+  extra?: object;
+
   /**
    * 用户设置
    */
diff --git a/server/services/core/user/user.service.ts b/server/services/core/user/user.service.ts
index 0b57c449..00f847ba 100644
--- a/server/services/core/user/user.service.ts
+++ b/server/services/core/user/user.service.ts
@@ -45,10 +45,12 @@ class UserService extends TcService {
       '_id',
       'username',
       'email',
-      'avatar',
       'nickname',
       'discriminator',
       'temporary',
+      'avatar',
+      'type',
+      'extra',
       'createdAt',
     ]);
 
@@ -157,6 +159,12 @@ class UserService extends TcService {
         fieldValue: 'any',
       },
     });
+    this.registerAction('updateUserExtra', this.updateUserExtra, {
+      params: {
+        fieldName: 'string',
+        fieldValue: 'any',
+      },
+    });
     this.registerAction('getUserSettings', this.getUserSettings);
     this.registerAction('setUserSettings', this.setUserSettings, {
       params: {
@@ -546,6 +554,9 @@ class UserService extends TcService {
     return list;
   }
 
+  /**
+   * 修改用户字段
+   */
   async updateUserField(
     ctx: TcContext<{ fieldName: string; fieldValue: string }>
   ) {
@@ -553,7 +564,8 @@ class UserService extends TcService {
     const t = ctx.meta.t;
     const userId = ctx.meta.userId;
     if (!['nickname', 'avatar'].includes(fieldName)) {
-      throw new EntityError(t('该数据不允许修改'));
+      // 只允许修改以上字段
+      throw new EntityError(`${t('该数据不允许修改')}: ${fieldName}`);
     }
 
     const doc = await this.adapter.model
@@ -575,6 +587,34 @@ class UserService extends TcService {
     return await this.transformDocuments(ctx, {}, doc);
   }
 
+  /**
+   * 修改用户额外数据
+   */
+  async updateUserExtra(
+    ctx: TcContext<{ fieldName: string; fieldValue: string }>
+  ) {
+    const { fieldName, fieldValue } = ctx.params;
+    const userId = ctx.meta.userId;
+
+    const doc = await this.adapter.model
+      .findOneAndUpdate(
+        {
+          _id: new Types.ObjectId(userId),
+        },
+        {
+          [`extra.${fieldName}`]: fieldValue,
+        },
+        {
+          new: true,
+        }
+      )
+      .exec();
+
+    this.cleanCurrentUserCache(ctx);
+
+    return await this.transformDocuments(ctx, {}, doc);
+  }
+
   /**
    * 获取用户个人配置
    */
diff --git a/server/test/integration/user/user.spec.ts b/server/test/integration/user/user.spec.ts
index 84926bf4..f328803a 100644
--- a/server/test/integration/user/user.spec.ts
+++ b/server/test/integration/user/user.spec.ts
@@ -103,6 +103,48 @@ describe('Test "user" service', () => {
     expect(res).not.toHaveProperty('password');
   });
 
+  test('Test "user.updateUserExtra"', async () => {
+    const testUser = await insertTestData(createTestUser());
+
+    const res = await broker.call(
+      'user.updateUserExtra',
+      {
+        fieldName: 'foo',
+        fieldValue: 'bar',
+      },
+      {
+        meta: {
+          userId: String(testUser._id),
+        },
+      }
+    );
+
+    expect(res).toMatchObject({
+      extra: {
+        foo: 'bar',
+      },
+    });
+
+    const res2 = await broker.call(
+      'user.updateUserExtra',
+      {
+        fieldName: 'foo',
+        fieldValue: 'baz',
+      },
+      {
+        meta: {
+          userId: String(testUser._id),
+        },
+      }
+    );
+
+    expect(res2).toMatchObject({
+      extra: {
+        foo: 'baz',
+      },
+    });
+  });
+
   test('Test "user.setUserSettings"', async () => {
     const testUser = await insertTestData(createTestUser());