diff --git a/backend/controller/api.go b/backend/controller/api.go
index 12fc652..db9001c 100644
--- a/backend/controller/api.go
+++ b/backend/controller/api.go
@@ -86,6 +86,15 @@ const (
 
 var ErrAccountBanned = errors.New("账户已被封禁")
 
+func (ar *APIRouter) GetBearerToken(c *gin.Context) (string, error) {
+	bearer := c.GetHeader("Authorization")
+	if bearer == "" {
+		return "", errors.New("no bearer token")
+	}
+
+	return bearer[7:], nil
+}
+
 // 鉴权
 // 如果是服务鉴权，则拿Authorization头对比service.token
 // 其他的都是用户鉴权，直接尝试从GetUin取uin
diff --git a/backend/controller/oauthapi.go b/backend/controller/oauthapi.go
index 5f10673..ee99a55 100644
--- a/backend/controller/oauthapi.go
+++ b/backend/controller/oauthapi.go
@@ -21,6 +21,7 @@ func NewOAuth2Router(rg *gin.RouterGroup, oas service.OAuth2Service) *OAuth2Rout
 	group.GET("/get-app-info", oar.GetOAuth2AppInfo)
 	group.GET("/authorize", oar.Authorize)
 	group.POST("/get-access-token", oar.GetAccessToken)
+	group.GET("/get-user-info", oar.GetUserInfo)
 
 	return oar
 }
@@ -108,3 +109,30 @@ func (oar *OAuth2Router) GetAccessToken(c *gin.Context) {
 		"access_token": ak,
 	})
 }
+
+func (oar *OAuth2Router) GetUserInfo(c *gin.Context) {
+	ak, err := oar.GetBearerToken(c)
+
+	if err != nil {
+		oar.StatusCode(c, 401, err.Error())
+		return
+	}
+
+	account, err := oar.OAuth2Service.GetUserInfo(ak)
+
+	if err != nil {
+		if err == service.ErrInvalidOAuth2AccessToken {
+			oar.StatusCode(c, 401, err.Error())
+			return
+		} else {
+			oar.Fail(c, 1, err.Error())
+			return
+		}
+	}
+
+	oar.Success(c, gin.H{
+		"uin":        account.Uin,
+		"user_group": account.UserGroup,
+		"created_at": account.CreatedAt,
+	})
+}
diff --git a/backend/service/errors.go b/backend/service/errors.go
index 5232843..0b4a163 100644
--- a/backend/service/errors.go
+++ b/backend/service/errors.go
@@ -19,3 +19,6 @@ var ErrOAuth2AppAlreadyExist = errors.New("OAuth2应用名称已存在")
 
 // OAuth2认证 Secret 不匹配
 var ErrOAuth2SecretNotMatch = errors.New("OAuth2 认证 Secret 不匹配")
+
+// 无效的 OAuth2 Access Token
+var ErrInvalidOAuth2AccessToken = errors.New("无效的 OAuth2 Access Token")
diff --git a/backend/service/oauth.go b/backend/service/oauth.go
index e494aa5..481a89a 100644
--- a/backend/service/oauth.go
+++ b/backend/service/oauth.go
@@ -65,3 +65,13 @@ func (oas *OAuth2Service) GetAccessToken(clientID, clientSecret, code string) (s
 
 	return accessToken, err
 }
+
+func (oas *OAuth2Service) GetUserInfo(accessToken string) (*database.AccountPO, error) {
+	uin, _, err := util.ParseOAuth2AccessTokenJWTToken(accessToken)
+
+	if err != nil {
+		return &database.AccountPO{}, ErrInvalidOAuth2AccessToken
+	}
+
+	return oas.DB.GetAccountByUIN(uin)
+}