diff --git a/src/water-records/dto/water-record.dto.ts b/src/water-records/dto/water-record.dto.ts
index 272798d..79f66c7 100644
--- a/src/water-records/dto/water-record.dto.ts
+++ b/src/water-records/dto/water-record.dto.ts
@@ -242,11 +242,25 @@ export class WaterGoalResponseDto extends BaseResponseDto {
 }
 
 /**
- * 今日喝水统计响应DTO
+ * 获取喝水统计查询参数DTO
  */
-export class TodayWaterStatsResponseDto extends BaseResponseDto {
+export class GetWaterStatsQueryDto {
   @ApiProperty({
-    description: '今日喝水统计',
+    description: '查询日期 (YYYY-MM-DD)，不传则默认为今天',
+    example: '2023-12-01',
+    required: false,
+  })
+  @IsOptional()
+  @IsDateString({}, { message: '日期格式不正确，请使用 YYYY-MM-DD 格式' })
+  date?: string;
+}
+
+/**
+ * 喝水统计响应DTO
+ */
+export class WaterStatsResponseDto extends BaseResponseDto {
+  @ApiProperty({
+    description: '喝水统计数据',
     example: {
       date: '2023-12-01',
       totalAmount: 1500,
diff --git a/src/water-records/water-records.controller.ts b/src/water-records/water-records.controller.ts
index 14a0444..f99efea 100644
--- a/src/water-records/water-records.controller.ts
+++ b/src/water-records/water-records.controller.ts
@@ -23,7 +23,8 @@ import {
   WaterRecordsListResponseDto,
   UpdateWaterGoalDto,
   WaterGoalResponseDto,
-  TodayWaterStatsResponseDto
+  GetWaterStatsQueryDto,
+  WaterStatsResponseDto
 } from './dto/water-record.dto';
 import { JwtAuthGuard } from '../common/guards/jwt-auth.guard';
 import { CurrentUser } from '../common/decorators/current-user.decorator';
@@ -130,17 +131,20 @@ export class WaterRecordsController {
   }
 
   /**
-   * 获取今日喝水统计
+   * 获取指定日期的喝水统计
    */
   @UseGuards(JwtAuthGuard)
-  @Get('stats/today')
+  @Get('stats')
   @HttpCode(HttpStatus.OK)
-  @ApiOperation({ summary: '获取今日喝水统计' })
-  @ApiResponse({ status: 200, description: '成功获取今日喝水统计', type: TodayWaterStatsResponseDto })
-  async getTodayWaterStats(
+  @ApiOperation({ summary: '获取指定日期的喝水统计' })
+  @ApiQuery({ name: 'date', required: false, description: '查询日期 (YYYY-MM-DD)，不传则默认为今天' })
+  @ApiResponse({ status: 200, description: '成功获取喝水统计', type: WaterStatsResponseDto })
+  async getWaterStats(
+    @Query() query: GetWaterStatsQueryDto,
     @CurrentUser() user: AccessTokenPayload,
-  ): Promise<TodayWaterStatsResponseDto> {
-    this.logger.log(`获取今日喝水统计 - 用户ID: ${user.sub}`);
-    return this.waterRecordsService.getTodayWaterStats(user.sub);
+  ): Promise<WaterStatsResponseDto> {
+    const targetDate = query.date || new Date().toISOString().split('T')[0];
+    this.logger.log(`获取喝水统计 - 用户ID: ${user.sub}, 日期: ${targetDate}`);
+    return this.waterRecordsService.getWaterStats(user.sub, targetDate);
   }
 }
\ No newline at end of file
diff --git a/src/water-records/water-records.service.ts b/src/water-records/water-records.service.ts
index 25ac468..a207b41 100644
--- a/src/water-records/water-records.service.ts
+++ b/src/water-records/water-records.service.ts
@@ -10,7 +10,7 @@ import {
   WaterRecordsListResponseDto,
   UpdateWaterGoalDto,
   WaterGoalResponseDto,
-  TodayWaterStatsResponseDto
+  WaterStatsResponseDto
 } from './dto/water-record.dto';
 import { Op } from 'sequelize';
 
@@ -214,17 +214,21 @@ export class WaterRecordsService {
   }
 
   /**
-   * 获取今日喝水统计
+   * 获取指定日期的喝水统计
    */
-  async getTodayWaterStats(userId: string): Promise<TodayWaterStatsResponseDto> {
+  async getWaterStats(userId: string, date: string): Promise<WaterStatsResponseDto> {
     try {
-      // 获取今天的开始和结束时间
-      const today = new Date();
-      const startOfDay = new Date(today.getFullYear(), today.getMonth(), today.getDate());
-      const endOfDay = new Date(today.getFullYear(), today.getMonth(), today.getDate(), 23, 59, 59, 999);
+      // 解析日期并获取当天的开始和结束时间
+      const targetDate = new Date(date);
+      if (isNaN(targetDate.getTime())) {
+        throw new BadRequestException('日期格式不正确');
+      }
 
-      // 获取今日喝水记录
-      const todayRecords = await this.userWaterHistoryModel.findAll({
+      const startOfDay = new Date(targetDate.getFullYear(), targetDate.getMonth(), targetDate.getDate());
+      const endOfDay = new Date(targetDate.getFullYear(), targetDate.getMonth(), targetDate.getDate(), 23, 59, 59, 999);
+
+      // 获取指定日期的喝水记录
+      const dayRecords = await this.userWaterHistoryModel.findAll({
         where: {
           userId,
           recordedAt: {
@@ -234,8 +238,8 @@ export class WaterRecordsService {
         order: [['recordedAt', 'ASC']],
       });
 
-      // 计算今日总喝水量
-      const totalAmount = todayRecords.reduce((sum, record) => sum + record.amount, 0);
+      // 计算当日总喝水量
+      const totalAmount = dayRecords.reduce((sum, record) => sum + record.amount, 0);
 
       // 获取用户的喝水目标
       const userProfile = await this.userProfileModel.findOne({
@@ -247,14 +251,14 @@ export class WaterRecordsService {
 
       return {
         success: true,
-        message: '获取今日喝水统计成功',
+        message: '获取喝水统计成功',
         data: {
           date: startOfDay.toISOString().split('T')[0],
           totalAmount,
           dailyGoal,
           completionRate: Math.round(completionRate * 100) / 100,
-          recordCount: todayRecords.length,
-          records: todayRecords.map(record => ({
+          recordCount: dayRecords.length,
+          records: dayRecords.map(record => ({
             id: record.id,
             amount: record.amount,
             recordedAt: record.recordedAt,
@@ -263,8 +267,11 @@ export class WaterRecordsService {
         },
       };
     } catch (error) {
-      this.logger.error(`获取今日喝水统计失败: ${error.message}`, error.stack);
-      throw new BadRequestException('获取今日喝水统计失败');
+      this.logger.error(`获取喝水统计失败: ${error.message}`, error.stack);
+      if (error instanceof BadRequestException) {
+        throw error;
+      }
+      throw new BadRequestException('获取喝水统计失败');
     }
   }
 }
\ No newline at end of file