diff --git a/Api/PictureController.cs b/Api/PictureController.cs
index 1b401d0..66a46e7 100644
--- a/Api/PictureController.cs
+++ b/Api/PictureController.cs
@@ -83,7 +83,9 @@ public class PictureController(IPictureService pictureService, IConfigService co
                 userId,
                 (PermissionType)request.Permission!,
                 request.AlbumId,
-                request.StorageType
+                request.StorageType,
+                request.ConvertToFormat,
+                request.Quality
             );
 
             var picture = result.Picture;
diff --git a/Models/Request/Picture/UploadPictureRequest.cs b/Models/Request/Picture/UploadPictureRequest.cs
index 6e1553b..908edfd 100644
--- a/Models/Request/Picture/UploadPictureRequest.cs
+++ b/Models/Request/Picture/UploadPictureRequest.cs
@@ -1,16 +1,30 @@
 using System.ComponentModel.DataAnnotations;
 using Foxel.Models.DataBase;
+using Foxel.Models.Enums;
 using Foxel.Services.Attributes;
 
 namespace Foxel.Models.Request.Picture;
 
 public record UploadPictureRequest
 {
-    [Required] public IFormFile File { get; set; } = null!;
+    [Required(ErrorMessage = "文件不能为空")]
+    public IFormFile File { get; set; } = null!;
 
-    public int? Permission { get; set; } = 1;
+    [Range(0, 2, ErrorMessage = "权限类型必须是0（公开）、1（私有）或2（仅关注者）")]
+    public int? Permission { get; set; } = 0;
 
-    public int? AlbumId { get; set; } = null;
-    
-    public StorageType? StorageType { get; set; } = null;
+    public int? AlbumId { get; set; }
+
+    public StorageType? StorageType { get; set; }
+
+    /// <summary>
+    /// 目标图片格式，默认为保持原格式
+    /// </summary>
+    public ImageFormat ConvertToFormat { get; set; } = ImageFormat.Original;
+
+    /// <summary>
+    /// 图片质量（仅对JPEG和WebP有效，1-100）
+    /// </summary>
+    [Range(1, 100, ErrorMessage = "图片质量必须在1-100之间")]
+    public int Quality { get; set; } = 95;
 }
\ No newline at end of file
diff --git a/Services/Background/BackgroundTaskQueue.cs b/Services/Background/BackgroundTaskQueue.cs
index af06fe7..bc7b566 100644
--- a/Services/Background/BackgroundTaskQueue.cs
+++ b/Services/Background/BackgroundTaskQueue.cs
@@ -238,8 +238,7 @@ public sealed class BackgroundTaskQueue : IBackgroundTaskQueue, IDisposable
             await UpdatePictureStatus(task.PictureId, ProcessingStatus.Processing, 20);
             var thumbnailPath = Path.Combine(
                 Path.GetDirectoryName(localFilePath)!,
-                Path.GetFileNameWithoutExtension(Path.GetFileName(localFilePath)) + "_thumb" +
-                Path.GetExtension(localFilePath));
+                Path.GetFileNameWithoutExtension(Path.GetFileName(localFilePath)) + "_thumb.webp");
 
             await ImageHelper.CreateThumbnailAsync(localFilePath, thumbnailPath, 500);
 
@@ -257,7 +256,7 @@ public sealed class BackgroundTaskQueue : IBackgroundTaskQueue, IDisposable
                 // 非本地存储，上传缩略图到对应的存储服务
                 await using var thumbnailFileStream = new FileStream(thumbnailPath, FileMode.Open, FileAccess.Read);
                 var thumbnailFileName = Path.GetFileName(thumbnailPath);
-                var thumbnailContentType = Path.GetExtension(thumbnailPath).ToLower() == ".png" ? "image/png" : "image/jpeg";
+                var thumbnailContentType = "image/webp";
 
                 // 上传缩略图并获取存储路径或元数据
                 string thumbnailStoragePath = await storageService.SaveAsync(
diff --git a/Services/Media/IPictureService.cs b/Services/Media/IPictureService.cs
index b1c6902..6ed9472 100644
--- a/Services/Media/IPictureService.cs
+++ b/Services/Media/IPictureService.cs
@@ -1,5 +1,6 @@
 using Foxel.Models;
 using Foxel.Models.DataBase;
+using Foxel.Models.Enums;
 using Foxel.Models.Response.Picture;
 using Foxel.Services.Attributes;
 
@@ -33,7 +34,9 @@ public interface IPictureService
         int? userId, 
         PermissionType permission = PermissionType.Public, 
         int? albumId = null,
-        StorageType? storageType = null
+        StorageType? storageType = null,
+        ImageFormat convertToFormat = ImageFormat.Original,
+        int quality = 95
         );
     
     Task<ExifInfo> GetPictureExifInfoAsync(int pictureId);
diff --git a/Services/Media/PictureService.cs b/Services/Media/PictureService.cs
index 1740708..8cf8e53 100644
--- a/Services/Media/PictureService.cs
+++ b/Services/Media/PictureService.cs
@@ -1,6 +1,7 @@
 using System.Text.Json;
 using Foxel.Models;
 using Foxel.Models.DataBase;
+using Foxel.Models.Enums;
 using Foxel.Models.Response.Picture;
 using Foxel.Services.AI;
 using Foxel.Services.Attributes;
@@ -436,7 +437,9 @@ public class PictureService(
         int? userId,
         PermissionType permission = PermissionType.Public,
         int? albumId = null,
-        StorageType? storageType = null)
+        StorageType? storageType = null,
+        ImageFormat convertToFormat = ImageFormat.Original,
+        int quality = 95)
     {
         // 如果未指定存储类型，则从配置中获取默认存储类型
         if (storageType == null)
@@ -449,88 +452,143 @@ public class PictureService(
             storageType = defaultStorageType;
         }
 
-        string fileExtension = Path.GetExtension(fileName);
-        _ = $"{Guid.NewGuid()}{fileExtension}";
+        string originalFileName = fileName;
+        string finalFileName = fileName;
+        string finalContentType = contentType;
+        Stream finalStream = fileStream;
 
-        // 使用存储服务保存文件
-        string relativePath = await storageService.SaveAsync(storageType.Value, fileStream, fileName, contentType);
-
-        // 创建基本的Picture对象，使用文件名作为标题和描述
-        string initialTitle = Path.GetFileNameWithoutExtension(fileName);
-        string initialDescription = $"Uploaded on {DateTime.UtcNow}";
-
-        await using var dbContext = await contextFactory.CreateDbContextAsync();
-
-        // 获取用户
-        User? user = null;
-        if (userId is not null)
+        // 如果需要格式转换
+        if (convertToFormat != ImageFormat.Original)
         {
-            user = await dbContext.Users.FirstOrDefaultAsync(u => u.Id == userId);
-            if (user == null)
+            // 创建临时文件保存原始上传内容
+            string tempOriginalFile = Path.GetTempFileName();
+            string tempConvertedFile = Path.GetTempFileName();
+
+            try
             {
-                throw new Exception("找不到指定的用户");
+                // 保存原始文件到临时位置
+                await using (var tempFileStream = new FileStream(tempOriginalFile, FileMode.Create))
+                {
+                    await fileStream.CopyToAsync(tempFileStream);
+                }
+
+                // 转换格式
+                string convertedFilePath = await ImageHelper.ConvertImageFormatAsync(
+                    tempOriginalFile, tempConvertedFile, convertToFormat, quality);
+
+                // 更新文件信息
+                string newExtension = ImageHelper.GetFileExtensionFromFormat(convertToFormat);
+                finalFileName = Path.ChangeExtension(Path.GetFileNameWithoutExtension(originalFileName), newExtension);
+                finalContentType = ImageHelper.GetMimeTypeFromFormat(convertToFormat);
+
+                // 创建新的流用于上传转换后的文件
+                finalStream = new FileStream(convertedFilePath, FileMode.Open, FileAccess.Read);
+            }
+            catch
+            {
+                // 清理临时文件
+                if (File.Exists(tempOriginalFile)) File.Delete(tempOriginalFile);
+                if (File.Exists(tempConvertedFile)) File.Delete(tempConvertedFile);
+                throw;
             }
         }
 
-        // 检查相册是否存在并且属于当前用户
-        Album? album = null;
-        if (albumId.HasValue)
+        try
         {
-            album = await dbContext.Albums.Include(a => a.User)
-                .FirstOrDefaultAsync(a => a.Id == albumId.Value);
+            // 使用存储服务保存文件
+            string relativePath = await storageService.SaveAsync(storageType.Value, finalStream, finalFileName, finalContentType);
 
-            if (album == null)
+            // 创建基本的Picture对象，使用文件名作为标题和描述
+            string initialTitle = Path.GetFileNameWithoutExtension(originalFileName);
+            string initialDescription = $"Uploaded on {DateTime.UtcNow}";
+
+            await using var dbContext = await contextFactory.CreateDbContextAsync();
+
+            // 获取用户
+            User? user = null;
+            if (userId is not null)
             {
-                throw new KeyNotFoundException($"找不到ID为{albumId.Value}的相册");
+                user = await dbContext.Users.FirstOrDefaultAsync(u => u.Id == userId);
+                if (user == null)
+                {
+                    throw new Exception("找不到指定的用户");
+                }
             }
 
-            if (album.User.Id != userId)
+            // 检查相册是否存在并且属于当前用户
+            Album? album = null;
+            if (albumId.HasValue)
             {
-                throw new Exception("您无权将图片添加到此相册");
+                album = await dbContext.Albums.Include(a => a.User)
+                    .FirstOrDefaultAsync(a => a.Id == albumId.Value);
+
+                if (album == null)
+                {
+                    throw new KeyNotFoundException($"找不到ID为{albumId.Value}的相册");
+                }
+
+                if (album.User.Id != userId)
+                {
+                    throw new Exception("您无权将图片添加到此相册");
+                }
+            }
+
+            bool isAnonymous = userId == null;
+
+            // 创建图片对象并保存到数据库
+            var picture = new Picture
+            {
+                Name = initialTitle,
+                Description = initialDescription,
+                Path = relativePath,
+                User = user,
+                Permission = permission,
+                AlbumId = albumId,
+                StorageType = storageType.Value,
+                ProcessingStatus = isAnonymous ? ProcessingStatus.Completed : ProcessingStatus.Pending,
+                ThumbnailPath = isAnonymous ? relativePath : null  
+            };
+
+            dbContext.Pictures.Add(picture);
+            await dbContext.SaveChangesAsync();
+
+            if (!isAnonymous)
+            {
+                await backgroundTaskQueue.QueuePictureProcessingTaskAsync(picture.Id, relativePath);
+            }
+
+            // 返回图片基本信息
+            var pictureResponse = new PictureResponse
+            {
+                Id = picture.Id,
+                Name = picture.Name,
+                Path = storageService.GetUrl(picture.StorageType, relativePath),
+                ThumbnailPath = isAnonymous ? storageService.GetUrl(picture.StorageType, relativePath) : null,  
+                Description = picture.Description,
+                CreatedAt = picture.CreatedAt,
+                Tags = new List<string>(),
+                Permission = permission,
+                AlbumId = albumId,
+                AlbumName = album?.Name,
+                ProcessingStatus = picture.ProcessingStatus
+            };
+
+            return (pictureResponse, picture.Id);
+        }
+        finally
+        {
+            // 清理转换后的临时流
+            if (finalStream != fileStream && finalStream is FileStream tempFileStream)
+            {
+                string tempFilePath = tempFileStream.Name;
+                finalStream.Dispose();
+                if (File.Exists(tempFilePath)) File.Delete(tempFilePath);
+                
+                // 同时清理原始临时文件
+                string tempOriginalFile = Path.ChangeExtension(tempFilePath, null);
+                if (File.Exists(tempOriginalFile)) File.Delete(tempOriginalFile);
             }
         }
-
-        bool isAnonymous = userId == null;
-
-        // 创建图片对象并保存到数据库
-        var picture = new Picture
-        {
-            Name = initialTitle,
-            Description = initialDescription,
-            Path = relativePath,
-            User = user,
-            Permission = permission,
-            AlbumId = albumId,
-            StorageType = storageType.Value,
-            ProcessingStatus = isAnonymous ? ProcessingStatus.Completed : ProcessingStatus.Pending,
-            ThumbnailPath = isAnonymous ? relativePath : null  
-        };
-
-        dbContext.Pictures.Add(picture);
-        await dbContext.SaveChangesAsync();
-
-        if (!isAnonymous)
-        {
-            await backgroundTaskQueue.QueuePictureProcessingTaskAsync(picture.Id, relativePath);
-        }
-
-        // 返回图片基本信息
-        var pictureResponse = new PictureResponse
-        {
-            Id = picture.Id,
-            Name = picture.Name,
-            Path = storageService.GetUrl(picture.StorageType, relativePath),
-            ThumbnailPath = isAnonymous ? storageService.GetUrl(picture.StorageType, relativePath) : null,  
-            Description = picture.Description,
-            CreatedAt = picture.CreatedAt,
-            Tags = new List<string>(),
-            Permission = permission,
-            AlbumId = albumId,
-            AlbumName = album?.Name,
-            ProcessingStatus = picture.ProcessingStatus
-        };
-
-        return (pictureResponse, picture.Id);
     }
 
     public async Task<ExifInfo> GetPictureExifInfoAsync(int pictureId)
diff --git a/Utils/ImageHelper.cs b/Utils/ImageHelper.cs
index dcb35f3..3955fe8 100644
--- a/Utils/ImageHelper.cs
+++ b/Utils/ImageHelper.cs
@@ -3,6 +3,7 @@ using SixLabors.ImageSharp.Processing;
 using SixLabors.ImageSharp.Metadata.Profiles.Exif;
 using System.Globalization;
 using Foxel.Models;
+using Foxel.Models.Enums;
 using SixLabors.ImageSharp.PixelFormats;
 
 namespace Foxel.Utils;
@@ -53,54 +54,26 @@ public static class ImageHelper
             Mode = ResizeMode.Max
         }));
 
-        string extension = Path.GetExtension(thumbnailPath).ToLower();
+        // 强制使用 WebP 格式，修改缩略图路径扩展名
+        string webpThumbnailPath = Path.ChangeExtension(thumbnailPath, ".webp");
 
-        // 根据原图大小动态调整质量
-        int adjustedQuality = AdjustQualityByFileSize(originalSize, extension, quality);
+        int adjustedQuality = AdjustQualityByFileSize(originalSize, ".webp", quality);
 
-        if (extension == ".jpg" || extension == ".jpeg")
+        await image.SaveAsWebpAsync(webpThumbnailPath, new SixLabors.ImageSharp.Formats.Webp.WebpEncoder
         {
-            await image.SaveAsJpegAsync(thumbnailPath, new SixLabors.ImageSharp.Formats.Jpeg.JpegEncoder
-            {
-                Quality = adjustedQuality
-            });
-        }
-        else if (extension == ".png")
-        {
-            await image.SaveAsPngAsync(thumbnailPath, new SixLabors.ImageSharp.Formats.Png.PngEncoder
-            {
-                CompressionLevel = SixLabors.ImageSharp.Formats.Png.PngCompressionLevel.BestCompression,
-                ColorType = SixLabors.ImageSharp.Formats.Png.PngColorType.RgbWithAlpha, // 确保使用最优的颜色类型
-                FilterMethod = SixLabors.ImageSharp.Formats.Png.PngFilterMethod.Adaptive // 使用自适应过滤
-            });
-        }
-        else
-        {
-            await image.SaveAsync(thumbnailPath);
-        }
+            Quality = adjustedQuality,
+            Method = SixLabors.ImageSharp.Formats.Webp.WebpEncodingMethod.BestQuality
+        });
 
-        var thumbnailFileInfo = new FileInfo(thumbnailPath);
+        var thumbnailFileInfo = new FileInfo(webpThumbnailPath);
         if (thumbnailFileInfo.Length < originalSize) return thumbnailFileInfo.Length;
 
-        // 再次尝试优化，但不改变扩展名
-        if (extension == ".png")
+        await image.SaveAsWebpAsync(webpThumbnailPath, new SixLabors.ImageSharp.Formats.Webp.WebpEncoder
         {
-            await image.SaveAsPngAsync(thumbnailPath, new SixLabors.ImageSharp.Formats.Png.PngEncoder
-            {
-                CompressionLevel = SixLabors.ImageSharp.Formats.Png.PngCompressionLevel.BestCompression,
-                FilterMethod = SixLabors.ImageSharp.Formats.Png.PngFilterMethod.Adaptive
-            });
-            thumbnailFileInfo = new FileInfo(thumbnailPath);
-        }
-        else if (extension == ".jpg" || extension == ".jpeg")
-        {
-            // 如果是 JPEG，尝试降低质量进一步压缩
-            await image.SaveAsJpegAsync(thumbnailPath, new SixLabors.ImageSharp.Formats.Jpeg.JpegEncoder
-            {
-                Quality = Math.Max(adjustedQuality - 10, 60) // 再降低质量但不低于60
-            });
-            thumbnailFileInfo = new FileInfo(thumbnailPath);
-        }
+            Quality = Math.Max(adjustedQuality - 15, 50),
+            Method = SixLabors.ImageSharp.Formats.Webp.WebpEncodingMethod.BestQuality
+        });
+        thumbnailFileInfo = new FileInfo(webpThumbnailPath);
 
         return thumbnailFileInfo.Length;
     }
@@ -162,7 +135,16 @@ public static class ImageHelper
     /// </summary>
     private static int AdjustQualityByFileSize(long originalSize, string extension, int baseQuality)
     {
-        if (extension == ".jpg" || extension == ".jpeg")
+        if (extension == ".webp")
+        {
+            if (originalSize > 10 * 1024 * 1024) // 10MB
+                return Math.Min(baseQuality, 70);
+            else if (originalSize > 5 * 1024 * 1024) // 5MB
+                return Math.Min(baseQuality, 75);
+            else if (originalSize > 1 * 1024 * 1024) // 1MB
+                return Math.Min(baseQuality, 80);
+        }
+        else if (extension == ".jpg" || extension == ".jpeg")
         {
             if (originalSize > 10 * 1024 * 1024) // 10MB
                 return Math.Min(baseQuality, 65);
@@ -342,4 +324,125 @@ public static class ImageHelper
 
         return null;
     }
+
+    /// <summary>
+    /// 转换图片格式（无损转换并保留EXIF信息）
+    /// </summary>
+    /// <param name="inputPath">输入图片路径</param>
+    /// <param name="outputPath">输出图片路径</param>
+    /// <param name="targetFormat">目标格式</param>
+    /// <param name="quality">压缩质量(仅对JPEG和WebP有效，1-100)</param>
+    /// <returns>转换后的文件路径</returns>
+    public static async Task<string> ConvertImageFormatAsync(string inputPath, string outputPath, ImageFormat targetFormat, int quality = 95)
+    {
+        if (targetFormat == ImageFormat.Original)
+        {
+            // 如果是原格式，直接返回输入路径
+            return inputPath;
+        }
+
+        using var image = await Image.LoadAsync(inputPath);
+
+        // 保留原始EXIF信息
+        var originalExifProfile = image.Metadata.ExifProfile;
+
+        // 根据目标格式确定文件扩展名和输出路径
+        string extension = GetFileExtensionFromFormat(targetFormat);
+        string finalOutputPath = Path.ChangeExtension(outputPath, extension);
+
+        switch (targetFormat)
+        {
+            case ImageFormat.Jpeg:
+                await image.SaveAsJpegAsync(finalOutputPath, new SixLabors.ImageSharp.Formats.Jpeg.JpegEncoder
+                {
+                    Quality = quality
+                });
+                break;
+
+            case ImageFormat.Png:
+                await image.SaveAsPngAsync(finalOutputPath, new SixLabors.ImageSharp.Formats.Png.PngEncoder
+                {
+                    CompressionLevel = SixLabors.ImageSharp.Formats.Png.PngCompressionLevel.BestCompression,
+                    ColorType = SixLabors.ImageSharp.Formats.Png.PngColorType.RgbWithAlpha
+                });
+                break;
+
+            case ImageFormat.WebP:
+                await image.SaveAsWebpAsync(finalOutputPath, new SixLabors.ImageSharp.Formats.Webp.WebpEncoder
+                {
+                    Quality = quality,
+                    Method = SixLabors.ImageSharp.Formats.Webp.WebpEncodingMethod.BestQuality
+                });
+                break;
+            default:
+                throw new NotSupportedException($"不支持的图片格式: {targetFormat}");
+        }
+
+        // 如果原图有EXIF信息，保存到转换后的图片中
+        if (originalExifProfile != null)
+        {
+            using var convertedImage = await Image.LoadAsync(finalOutputPath);
+            convertedImage.Metadata.ExifProfile = originalExifProfile;
+
+            switch (targetFormat)
+            {
+            case ImageFormat.Jpeg:
+                await convertedImage.SaveAsJpegAsync(finalOutputPath, new SixLabors.ImageSharp.Formats.Jpeg.JpegEncoder
+                {
+                Quality = quality
+                });
+                break;
+
+            case ImageFormat.Png:
+                await convertedImage.SaveAsPngAsync(finalOutputPath, new SixLabors.ImageSharp.Formats.Png.PngEncoder
+                {
+                CompressionLevel = SixLabors.ImageSharp.Formats.Png.PngCompressionLevel.BestCompression,
+                ColorType = SixLabors.ImageSharp.Formats.Png.PngColorType.RgbWithAlpha
+                });
+                break;
+
+            case ImageFormat.WebP:
+                await convertedImage.SaveAsWebpAsync(finalOutputPath, new SixLabors.ImageSharp.Formats.Webp.WebpEncoder
+                {
+                Quality = quality,
+                Method = SixLabors.ImageSharp.Formats.Webp.WebpEncodingMethod.BestQuality
+                });
+                break;
+            }
+        }
+
+        return finalOutputPath;
+    }
+
+    /// <summary>
+    /// 根据图片格式获取文件扩展名
+    /// </summary>
+    /// <param name="format">图片格式</param>
+    /// <returns>文件扩展名</returns>
+    public static string GetFileExtensionFromFormat(ImageFormat format)
+    {
+        return format switch
+        {
+            ImageFormat.Jpeg => ".jpg",
+            ImageFormat.Png => ".png",
+            ImageFormat.WebP => ".webp",
+            _ => throw new NotSupportedException($"不支持的图片格式: {format}")
+        };
+    }
+
+    /// <summary>
+    /// 根据图片格式获取MIME类型
+    /// </summary>
+    /// <param name="format">图片格式</param>
+    /// <returns>MIME类型</returns>
+    public static string GetMimeTypeFromFormat(ImageFormat format)
+    {
+        return format switch
+        {
+            ImageFormat.Jpeg => "image/jpeg",
+            ImageFormat.Png => "image/png",
+            ImageFormat.WebP => "image/webp",
+            _ => throw new NotSupportedException($"不支持的图片格式: {format}")
+        };
+    }
 }
\ No newline at end of file
diff --git a/Web/src/api/pictureApi.ts b/Web/src/api/pictureApi.ts
index 8ae62ed..3f4cb07 100644
--- a/Web/src/api/pictureApi.ts
+++ b/Web/src/api/pictureApi.ts
@@ -119,6 +119,8 @@ export async function uploadPicture(
   data: {
     permission?: number;
     albumId?: number;
+    convertToFormat?: string;
+    quality?: number;
     onProgress?: (percent: number) => void
   } = {}
 ): Promise<BaseResult<PictureResponse>> {
@@ -133,6 +135,14 @@ export async function uploadPicture(
     formData.append('albumId', data.albumId.toString());
   }
 
+  if (data.convertToFormat !== undefined) {
+    formData.append('convertToFormat', data.convertToFormat.toString());
+  }
+
+  if (data.quality !== undefined) {
+    formData.append('quality', data.quality.toString());
+  }
+
   try {
     const token = localStorage.getItem('token');
     const headers: Record<string, string> = {};
diff --git a/Web/src/api/types.ts b/Web/src/api/types.ts
index e602ded..60faa07 100644
--- a/Web/src/api/types.ts
+++ b/Web/src/api/types.ts
@@ -103,10 +103,24 @@ export interface UploadFile {
   response?: PictureResponse;  // 上传成功后的响应
 }
 
-// 上传图片请求参数
+// 图片格式类型
+export type ImageFormat = 0 | 1 | 2 | 3;
+
+// 添加常量对象提供运行时值
+export const ImageFormat = {
+  Original: 0 as ImageFormat,
+  Jpeg: 1 as ImageFormat,
+  Png: 2 as ImageFormat,
+  WebP: 3 as ImageFormat
+};
+
+// 上传图片参数
 export interface UploadPictureParams {
-  permission?: number;  // 权限设置，默认为0（公开）
-  albumId?: number;     // 相册ID，可选
+  permission?: number;
+  albumId?: number;
+  convertToFormat?: ImageFormat;
+  quality?: number;
+  onProgress?: (percent: number) => void;
 }
 
 // 相册响应数据
diff --git a/Web/src/components/upload/ImageUploadDialog.tsx b/Web/src/components/upload/ImageUploadDialog.tsx
index db57b3a..774e4f7 100644
--- a/Web/src/components/upload/ImageUploadDialog.tsx
+++ b/Web/src/components/upload/ImageUploadDialog.tsx
@@ -1,9 +1,9 @@
 import React, { useState, useEffect } from 'react';
-import { Modal, Upload, Button, Progress, message, Form, Select, Radio, Slider } from 'antd';
+import { Modal, Upload, Button, Progress, message, Form, Select, Radio, Slider, Divider, Alert } from 'antd';
 import { InboxOutlined } from '@ant-design/icons';
 import { v4 as uuidv4 } from 'uuid';
-import type { UploadFile, UploadPictureParams, AlbumResponse } from '../../api';
-import { uploadPicture, getAlbums } from '../../api';
+import type { UploadFile, AlbumResponse } from '../../api';
+import { uploadPicture, getAlbums, ImageFormat } from '../../api';
 
 const { Dragger } = Upload;
 const { Option } = Select;
@@ -20,6 +20,8 @@ const ImageUploadDialog: React.FC<UploadDialogProps> = ({ visible, onClose, onUp
   const [form] = Form.useForm();
   const [albums, setAlbums] = useState<AlbumResponse[]>([]);
   const [concurrentUploads, setConcurrentUploads] = useState<number>(3);
+  const [convertFormat, setConvertFormat] = useState<ImageFormat>(ImageFormat.Original);
+  const [quality, setQuality] = useState<number>(95);
   
   useEffect(() => {
     if (visible) {
@@ -75,13 +77,23 @@ const ImageUploadDialog: React.FC<UploadDialogProps> = ({ visible, onClose, onUp
       setUploading(true);
       const values = await form.validateFields();
       
-      const params: UploadPictureParams = {};
+      const params: { // 修改此处的类型定义
+        permission?: number;
+        albumId?: number;
+        convertToFormat?: string; // 允许 string 类型
+        quality?: number;
+      } = {};
+
       if (values.permission !== undefined) {
         params.permission = values.permission;
       }
       if (values.albumId) {
         params.albumId = values.albumId;
       }
+      if (convertFormat !== ImageFormat.Original) {
+        params.convertToFormat = convertFormat.toString(); // 现在类型匹配
+        params.quality = quality;
+      }
       
       let successCount = 0;
       let failCount = 0;
@@ -98,7 +110,7 @@ const ImageUploadDialog: React.FC<UploadDialogProps> = ({ visible, onClose, onUp
 
         try {
           // 上传文件
-          const result = await uploadPicture(item.file, {
+          const result = await uploadPicture(item.file, { // 此处 params 类型现在匹配
             ...params,
             onProgress: (percent) => {
               setUploadQueue((prev) => 
@@ -205,6 +217,17 @@ const ImageUploadDialog: React.FC<UploadDialogProps> = ({ visible, onClose, onUp
     }
   };
 
+  // 获取格式名称
+  const getFormatName = (format: ImageFormat) => {
+    switch (format) {
+      case ImageFormat.Original: return '保持原格式';
+      case ImageFormat.Jpeg: return 'JPEG';
+      case ImageFormat.Png: return 'PNG';
+      case ImageFormat.WebP: return 'WebP';
+      default: return '未知格式';
+    }
+  };
+
   // 自定义上传列表项
   const renderUploadItem = (item: UploadFile) => {
     let statusIcon;
@@ -305,9 +328,9 @@ const ImageUploadDialog: React.FC<UploadDialogProps> = ({ visible, onClose, onUp
           onClick={uploadFiles}
         >
           {uploading ? '正在上传...' : '开始上传'}
-        </Button>,
+        </Button>
       ]}
-      width={600}
+      width={700}
     >
       <Form
         form={form}
@@ -336,9 +359,53 @@ const ImageUploadDialog: React.FC<UploadDialogProps> = ({ visible, onClose, onUp
             <Radio value={0}>公开</Radio>
             <Radio value={1}>好友可见</Radio>
             <Radio value={2}>仅自己</Radio>
-
           </Radio.Group>
         </Form.Item>
+
+        <Divider orientation="left">格式转换设置</Divider>
+        
+        <Form.Item label="输出格式">
+          <Radio.Group
+            value={convertFormat}
+            onChange={(e) => setConvertFormat(e.target.value)}
+            optionType="button"
+            buttonStyle="solid"
+            style={{ display: 'flex', flexWrap: 'wrap', gap: '8px' }}
+          >
+            <Radio.Button value={ImageFormat.Original}>保持原格式</Radio.Button>
+            <Radio.Button value={ImageFormat.Jpeg}>JPEG (.jpg)</Radio.Button>
+            <Radio.Button value={ImageFormat.Png}>PNG (.png)</Radio.Button>
+            <Radio.Button value={ImageFormat.WebP}>WebP (.webp)</Radio.Button>
+          </Radio.Group>
+        </Form.Item>
+
+        {convertFormat !== ImageFormat.Original && (
+          <>
+            {convertFormat === ImageFormat.Png ? (
+              <Alert
+                message="提示"
+                description={`${getFormatName(convertFormat)} 格式为无损压缩，不支持质量调节。`}
+                type="info"
+                showIcon
+                style={{ marginBottom: '16px' }}
+              />
+            ) : (
+              <Form.Item label={`图片质量 (${quality}%)`}>
+                <Slider
+                  min={50}
+                  max={100}
+                  value={quality}
+                  onChange={setQuality}
+                  marks={{ 50: '50%', 75: '75%', 90: '90%', 95: '95%', 100: '100%' }}
+                  tooltip={{ formatter: (value) => `${value}%` }}
+                />
+                <div style={{ fontSize: '12px', color: '#666', marginTop: '4px' }}>
+                  质量越高文件越大，建议使用 85-95% 的质量设置
+                </div>
+              </Form.Item>
+            )}
+          </>
+        )}
         
         <Form.Item
           name="concurrentUploads"
@@ -367,6 +434,14 @@ const ImageUploadDialog: React.FC<UploadDialogProps> = ({ visible, onClose, onUp
         <p className="ant-upload-text">点击或拖拽图片到此区域上传</p>
         <p className="ant-upload-hint">
           支持单个或批量上传，图片大小不超过10MB
+          {convertFormat !== ImageFormat.Original && (
+            <> 
+              <br />
+              <span style={{ color: '#1890ff' }}>
+                将转换为 {getFormatName(convertFormat)} 格式
+              </span>
+            </>
+          )}
         </p>
       </Dragger>