diff --git a/server/HoneyBox/src/HoneyBox.Admin.Business/Services/AdminConfigService.cs b/server/HoneyBox/src/HoneyBox.Admin.Business/Services/AdminConfigService.cs
index 80f47122..135c5c6e 100644
--- a/server/HoneyBox/src/HoneyBox.Admin.Business/Services/AdminConfigService.cs
+++ b/server/HoneyBox/src/HoneyBox.Admin.Business/Services/AdminConfigService.cs
@@ -119,6 +119,11 @@ public class AdminConfigService : IAdminConfigService
 
         if (existingConfig != null)
         {
+            // 如果值相同，直接返回成功（无需更新）
+            if (existingConfig.ConfigValue == jsonValue)
+            {
+                return true;
+            }
             // 更新现有配置
             existingConfig.ConfigValue = jsonValue;
         }
diff --git a/server/HoneyBox/src/HoneyBox.Core/Services/UserService.cs b/server/HoneyBox/src/HoneyBox.Core/Services/UserService.cs
index 30670c77..049ef8eb 100644
--- a/server/HoneyBox/src/HoneyBox.Core/Services/UserService.cs
+++ b/server/HoneyBox/src/HoneyBox.Core/Services/UserService.cs
@@ -1,3 +1,4 @@
+using System.Text.Json;
 using HoneyBox.Core.Interfaces;
 using HoneyBox.Model.Data;
 using HoneyBox.Model.Entities;
@@ -13,11 +14,13 @@ namespace HoneyBox.Core.Services;
 public class UserService : BaseService<User, int>, IUserService
 {
     private readonly ILogger<UserService> _logger;
+    private readonly IConfigService _configService;
 
-    public UserService(HoneyBoxDbContext dbContext, ILogger<UserService> logger)
+    public UserService(HoneyBoxDbContext dbContext, ILogger<UserService> logger, IConfigService configService)
         : base(dbContext)
     {
         _logger = logger;
+        _configService = configService;
     }
 
     /// <inheritdoc/>
@@ -59,8 +62,8 @@ public class UserService : BaseService<User, int>, IUserService
         if (dto == null)
             throw new ArgumentNullException(nameof(dto));
 
-        // Generate UID
-        var uid = GenerateUid();
+        // Generate UID based on config
+        var uid = await GenerateUidAsync();
 
         var user = new User
         {
@@ -273,12 +276,121 @@ public class UserService : BaseService<User, int>, IUserService
     /// <summary>
     /// Generate a unique UID for new user
     /// </summary>
-    private string GenerateUid()
+    private async Task<string> GenerateUidAsync()
     {
-        // Generate a numeric UID based on timestamp and random number
-        var timestamp = DateTimeOffset.UtcNow.ToUnixTimeSeconds();
-        var random = Random.Shared.Next(1000, 9999);
-        return $"{timestamp}{random}";
+        // 读取用户配置
+        var userConfigJson = await _configService.GetConfigValueAsync("user_config");
+        
+        int uidType = 2;  // 默认数字ID
+        int uidLength = 6; // 默认6位
+        
+        if (!string.IsNullOrEmpty(userConfigJson))
+        {
+            try
+            {
+                var userConfig = JsonSerializer.Deserialize<Dictionary<string, string>>(userConfigJson,
+                    new JsonSerializerOptions { PropertyNameCaseInsensitive = true });
+                
+                if (userConfig != null)
+                {
+                    if (userConfig.TryGetValue("uid_type", out var uidTypeStr) && int.TryParse(uidTypeStr, out var parsedType))
+                    {
+                        uidType = parsedType;
+                    }
+                    if (userConfig.TryGetValue("uid_length", out var uidLengthStr) && int.TryParse(uidLengthStr, out var parsedLength))
+                    {
+                        uidLength = parsedLength;
+                    }
+                }
+            }
+            catch (Exception ex)
+            {
+                _logger.LogWarning(ex, "Failed to parse user_config, using defaults");
+            }
+        }
+
+        // 根据配置生成UID
+        string uid;
+        int maxAttempts = 100;
+        int attempt = 0;
+        
+        do
+        {
+            uid = uidType switch
+            {
+                1 => await GenerateRealIdUidAsync(),           // 真实ID（基于数据库自增）
+                2 => GenerateNumericUid(uidLength),            // 数字ID
+                3 => GenerateAlphanumericUid(uidLength),       // 随机字符和数字
+                _ => GenerateNumericUid(uidLength)
+            };
+            attempt++;
+        }
+        while (await UidExistsAsync(uid) && attempt < maxAttempts);
+
+        if (attempt >= maxAttempts)
+        {
+            // 如果多次尝试都重复，使用时间戳+随机数作为后备方案
+            uid = $"{DateTimeOffset.UtcNow.ToUnixTimeMilliseconds()}{Random.Shared.Next(100, 999)}";
+        }
+
+        return uid;
+    }
+
+    /// <summary>
+    /// 检查UID是否已存在
+    /// </summary>
+    private async Task<bool> UidExistsAsync(string uid)
+    {
+        return await _dbSet.AnyAsync(u => u.Uid == uid);
+    }
+
+    /// <summary>
+    /// 生成真实ID类型的UID（基于当前最大用户ID）
+    /// </summary>
+    private async Task<string> GenerateRealIdUidAsync()
+    {
+        var maxId = await _dbSet.MaxAsync(u => (int?)u.Id) ?? 0;
+        return (maxId + 1).ToString();
+    }
+
+    /// <summary>
+    /// 生成纯数字UID
+    /// </summary>
+    private static string GenerateNumericUid(int length)
+    {
+        if (length < 4) length = 4;
+        if (length > 12) length = 12;
+        
+        // 第一位不能是0
+        var firstDigit = Random.Shared.Next(1, 10).ToString();
+        var remainingLength = length - 1;
+        
+        var remaining = new char[remainingLength];
+        for (int i = 0; i < remainingLength; i++)
+        {
+            remaining[i] = (char)('0' + Random.Shared.Next(0, 10));
+        }
+        
+        return firstDigit + new string(remaining);
+    }
+
+    /// <summary>
+    /// 生成字母数字混合UID
+    /// </summary>
+    private static string GenerateAlphanumericUid(int length)
+    {
+        if (length < 4) length = 4;
+        if (length > 16) length = 16;
+        
+        const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+        var result = new char[length];
+        
+        for (int i = 0; i < length; i++)
+        {
+            result[i] = chars[Random.Shared.Next(chars.Length)];
+        }
+        
+        return new string(result);
     }
 
     /// <summary>