diff --git a/cmd/s3-balance/main.go b/cmd/s3-balance/main.go
index 7839bfc..dfeac0f 100644
--- a/cmd/s3-balance/main.go
+++ b/cmd/s3-balance/main.go
@@ -17,6 +17,7 @@ import (
 	"github.com/DullJZ/s3-balance/internal/config"
 	"github.com/DullJZ/s3-balance/internal/database"
 	"github.com/DullJZ/s3-balance/internal/metrics"
+	"github.com/DullJZ/s3-balance/internal/scheduler"
 	"github.com/DullJZ/s3-balance/internal/storage"
 	"github.com/DullJZ/s3-balance/pkg/presigner"
 	"github.com/gorilla/mux"
@@ -80,6 +81,11 @@ func main() {
 	// 启动定期清理过期上传会话的任务
 	startSessionCleaner(ctx, storageService)
 
+	// 启动月度统计归档任务（每小时检查一次）
+	monthlyArchiver := scheduler.NewMonthlyArchiver(storageService, 1*time.Hour)
+	monthlyArchiver.Start()
+	defer monthlyArchiver.Stop()
+
 	// 创建S3兼容API处理器
 	s3Handler := api.NewS3Handler(
 		bucketManager,
@@ -124,6 +130,11 @@ func main() {
 		log.Printf("Metrics server enabled at %s", cfg.Metrics.Path)
 	}
 
+	// 添加统计API端点
+	statsHandler := api.NewStatsHandler(storageService)
+	statsHandler.RegisterRoutes(router)
+	log.Println("Statistics API endpoints registered at /api/stats/*")
+
 	// 运行在S3兼容模式
 	log.Println("Running in S3-compatible mode")
 	s3Handler.RegisterS3Routes(router)
diff --git a/internal/api/stats_handler.go b/internal/api/stats_handler.go
new file mode 100644
index 0000000..3436dc1
--- /dev/null
+++ b/internal/api/stats_handler.go
@@ -0,0 +1,193 @@
+package api
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+	"strconv"
+	"time"
+
+	"github.com/DullJZ/s3-balance/internal/storage"
+	"github.com/gorilla/mux"
+)
+
+// StatsHandler 统计数据处理器
+type StatsHandler struct {
+	storage *storage.Service
+}
+
+// NewStatsHandler 创建统计处理器
+func NewStatsHandler(storage *storage.Service) *StatsHandler {
+	return &StatsHandler{
+		storage: storage,
+	}
+}
+
+// RegisterRoutes 注册统计API路由
+func (h *StatsHandler) RegisterRoutes(router *mux.Router) {
+	router.HandleFunc("/api/stats/monthly", h.GetCurrentMonthStats).Methods("GET")
+	router.HandleFunc("/api/stats/monthly/{year}/{month}", h.GetMonthlyStats).Methods("GET")
+	router.HandleFunc("/api/stats/monthly/range", h.GetMonthlyStatsRange).Methods("GET")
+	router.HandleFunc("/api/stats/bucket/{bucket}/history", h.GetBucketHistory).Methods("GET")
+}
+
+// MonthlyStatsResponse 月度统计响应
+type MonthlyStatsResponse struct {
+	Year   int                   `json:"year"`
+	Month  int                   `json:"month"`
+	Bucket string                `json:"bucket"`
+	Stats  BucketOperationCounts `json:"stats"`
+}
+
+// BucketOperationCounts 存储桶操作计数
+type BucketOperationCounts struct {
+	OperationCountA int64 `json:"operation_count_a"`
+	OperationCountB int64 `json:"operation_count_b"`
+	Total           int64 `json:"total"`
+}
+
+// GetCurrentMonthStats 获取当前月份的统计
+func (h *StatsHandler) GetCurrentMonthStats(w http.ResponseWriter, r *http.Request) {
+	stats, err := h.storage.GetCurrentMonthStats()
+	if err != nil {
+		log.Printf("Failed to get current month stats: %v", err)
+		http.Error(w, "Failed to fetch statistics", http.StatusInternalServerError)
+		return
+	}
+
+	response := h.formatMonthlyStats(stats)
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(response)
+}
+
+// GetMonthlyStats 获取指定月份的统计
+func (h *StatsHandler) GetMonthlyStats(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	year, err := strconv.Atoi(vars["year"])
+	if err != nil {
+		http.Error(w, "Invalid year", http.StatusBadRequest)
+		return
+	}
+
+	month, err := strconv.Atoi(vars["month"])
+	if err != nil || month < 1 || month > 12 {
+		http.Error(w, "Invalid month", http.StatusBadRequest)
+		return
+	}
+
+	stats, err := h.storage.GetMonthlyStats(year, month)
+	if err != nil {
+		log.Printf("Failed to get monthly stats: %v", err)
+		http.Error(w, "Failed to fetch statistics", http.StatusInternalServerError)
+		return
+	}
+
+	response := h.formatMonthlyStats(stats)
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(response)
+}
+
+// GetMonthlyStatsRange 获取时间范围内的统计
+func (h *StatsHandler) GetMonthlyStatsRange(w http.ResponseWriter, r *http.Request) {
+	query := r.URL.Query()
+
+	startYear, err := strconv.Atoi(query.Get("start_year"))
+	if err != nil {
+		http.Error(w, "Invalid start_year", http.StatusBadRequest)
+		return
+	}
+
+	startMonth, err := strconv.Atoi(query.Get("start_month"))
+	if err != nil || startMonth < 1 || startMonth > 12 {
+		http.Error(w, "Invalid start_month", http.StatusBadRequest)
+		return
+	}
+
+	endYear, err := strconv.Atoi(query.Get("end_year"))
+	if err != nil {
+		http.Error(w, "Invalid end_year", http.StatusBadRequest)
+		return
+	}
+
+	endMonth, err := strconv.Atoi(query.Get("end_month"))
+	if err != nil || endMonth < 1 || endMonth > 12 {
+		http.Error(w, "Invalid end_month", http.StatusBadRequest)
+		return
+	}
+
+	stats, err := h.storage.GetMonthlyStatsRange(startYear, startMonth, endYear, endMonth)
+	if err != nil {
+		log.Printf("Failed to get monthly stats range: %v", err)
+		http.Error(w, "Failed to fetch statistics", http.StatusInternalServerError)
+		return
+	}
+
+	response := h.formatMonthlyStats(stats)
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(response)
+}
+
+// GetBucketHistory 获取指定存储桶的历史统计
+func (h *StatsHandler) GetBucketHistory(w http.ResponseWriter, r *http.Request) {
+	vars := mux.Vars(r)
+	bucket := vars["bucket"]
+
+	// 获取查询参数中的月份数，默认12个月
+	months := 12
+	if monthsStr := r.URL.Query().Get("months"); monthsStr != "" {
+		if m, err := strconv.Atoi(monthsStr); err == nil && m > 0 {
+			months = m
+		}
+	}
+
+	stats, err := h.storage.GetBucketMonthlyHistory(bucket, months)
+	if err != nil {
+		log.Printf("Failed to get bucket history: %v", err)
+		http.Error(w, "Failed to fetch statistics", http.StatusInternalServerError)
+		return
+	}
+
+	response := h.formatMonthlyStats(stats)
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(response)
+}
+
+// formatMonthlyStats 格式化月度统计数据
+func (h *StatsHandler) formatMonthlyStats(stats []storage.BucketMonthlyStats) []MonthlyStatsResponse {
+	result := make([]MonthlyStatsResponse, 0, len(stats))
+
+	for _, stat := range stats {
+		result = append(result, MonthlyStatsResponse{
+			Year:   stat.Year,
+			Month:  stat.Month,
+			Bucket: stat.BucketName,
+			Stats: BucketOperationCounts{
+				OperationCountA: stat.OperationCountA,
+				OperationCountB: stat.OperationCountB,
+				Total:           stat.OperationCountA + stat.OperationCountB,
+			},
+		})
+	}
+
+	return result
+}
+
+// ArchiveCurrentMonth 手动触发归档当前月份（管理API）
+func (h *StatsHandler) ArchiveCurrentMonth(w http.ResponseWriter, r *http.Request) {
+	now := time.Now()
+	year, month := now.Year(), int(now.Month())
+
+	if err := h.storage.ArchiveMonthlyStats(year, month); err != nil {
+		log.Printf("Failed to archive monthly stats: %v", err)
+		http.Error(w, "Failed to archive statistics", http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(map[string]string{
+		"status":  "success",
+		"message": "Monthly statistics archived successfully",
+		"year":    strconv.Itoa(year),
+		"month":   strconv.Itoa(month),
+	})
+}
diff --git a/internal/database/database.go b/internal/database/database.go
index 34459b8..9d1ff4f 100644
--- a/internal/database/database.go
+++ b/internal/database/database.go
@@ -181,6 +181,7 @@ func AutoMigrate() error {
 	models := []interface{}{
 		&storage.Object{},
 		&storage.BucketStats{},
+		&storage.BucketMonthlyStats{},
 		&storage.UploadSession{},
 		&storage.AccessLog{},
 		&storage.VirtualBucketMapping{},
diff --git a/internal/scheduler/monthly_archiver.go b/internal/scheduler/monthly_archiver.go
new file mode 100644
index 0000000..2302b9c
--- /dev/null
+++ b/internal/scheduler/monthly_archiver.go
@@ -0,0 +1,92 @@
+package scheduler
+
+import (
+	"log"
+	"time"
+
+	"github.com/DullJZ/s3-balance/internal/storage"
+)
+
+// MonthlyArchiver 月度统计归档器
+type MonthlyArchiver struct {
+	storage  *storage.Service
+	ticker   *time.Ticker
+	stopChan chan struct{}
+}
+
+// NewMonthlyArchiver 创建月度归档器
+func NewMonthlyArchiver(storage *storage.Service, checkInterval time.Duration) *MonthlyArchiver {
+	return &MonthlyArchiver{
+		storage:  storage,
+		ticker:   time.NewTicker(checkInterval),
+		stopChan: make(chan struct{}),
+	}
+}
+
+// Start 启动月度归档定期任务
+func (m *MonthlyArchiver) Start() {
+	log.Println("Starting monthly statistics archiver...")
+
+	// 启动时立即归档上个月的数据（如果还没有归档）
+	m.archiveLastMonth()
+
+	go func() {
+		for {
+			select {
+			case <-m.ticker.C:
+				m.checkAndArchive()
+			case <-m.stopChan:
+				log.Println("Monthly statistics archiver stopped")
+				return
+			}
+		}
+	}()
+}
+
+// Stop 停止归档任务
+func (m *MonthlyArchiver) Stop() {
+	close(m.stopChan)
+	m.ticker.Stop()
+}
+
+// checkAndArchive 检查并归档统计数据
+func (m *MonthlyArchiver) checkAndArchive() {
+	now := time.Now()
+
+	// 如果是每月的第一天凌晨，归档上个月的数据
+	if now.Day() == 1 && now.Hour() < 1 {
+		m.archiveLastMonth()
+	}
+
+	// 每天都归档当前月份（实时更新）
+	m.archiveCurrentMonth()
+}
+
+// archiveLastMonth 归档上个月的数据
+func (m *MonthlyArchiver) archiveLastMonth() {
+	now := time.Now()
+	lastMonth := now.AddDate(0, -1, 0)
+	year, month := lastMonth.Year(), int(lastMonth.Month())
+
+	log.Printf("Archiving monthly stats for %d-%02d...", year, month)
+
+	if err := m.storage.ArchiveMonthlyStats(year, month); err != nil {
+		log.Printf("Failed to archive monthly stats for %d-%02d: %v", year, month, err)
+		return
+	}
+
+	log.Printf("Successfully archived monthly stats for %d-%02d", year, month)
+}
+
+// archiveCurrentMonth 归档当前月份（实时更新）
+func (m *MonthlyArchiver) archiveCurrentMonth() {
+	now := time.Now()
+	year, month := now.Year(), int(now.Month())
+
+	if err := m.storage.ArchiveMonthlyStats(year, month); err != nil {
+		log.Printf("Failed to update current month stats for %d-%02d: %v", year, month, err)
+		return
+	}
+
+	log.Printf("Updated current month stats for %d-%02d", year, month)
+}
diff --git a/internal/storage/models.go b/internal/storage/models.go
index a88837f..25e7549 100644
--- a/internal/storage/models.go
+++ b/internal/storage/models.go
@@ -45,6 +45,23 @@ func (BucketStats) TableName() string {
 	return "bucket_stats"
 }
 
+// BucketMonthlyStats 存储桶月度统计信息模型
+type BucketMonthlyStats struct {
+	ID              uint      `gorm:"primaryKey" json:"id"`
+	BucketName      string    `gorm:"index:idx_bucket_month;size:255;not null" json:"bucket_name"`
+	Year            int       `gorm:"index:idx_bucket_month;not null" json:"year"`
+	Month           int       `gorm:"index:idx_bucket_month;not null" json:"month"`
+	OperationCountA int64     `gorm:"not null;default:0" json:"operation_count_a"`
+	OperationCountB int64     `gorm:"not null;default:0" json:"operation_count_b"`
+	CreatedAt       time.Time `json:"created_at"`
+	UpdatedAt       time.Time `json:"updated_at"`
+}
+
+// TableName 指定表名
+func (BucketMonthlyStats) TableName() string {
+	return "bucket_monthly_stats"
+}
+
 // VirtualBucketMapping 虚拟存储桶文件级映射模型
 type VirtualBucketMapping struct {
 	ID                uint      `gorm:"primaryKey" json:"id"`
diff --git a/internal/storage/service.go b/internal/storage/service.go
index 9ab629e..0d8a0c1 100644
--- a/internal/storage/service.go
+++ b/internal/storage/service.go
@@ -630,3 +630,113 @@ func (s *Service) DeleteVirtualBucketFileMapping(virtualBucketName, objectKey st
 	}
 	return nil
 }
+
+// ArchiveMonthlyStats 归档指定月份的统计数据
+// 如果该月份的记录已存在，则更新；否则创建新记录
+func (s *Service) ArchiveMonthlyStats(year, month int) error {
+	var stats []BucketStats
+	if err := s.db.Find(&stats).Error; err != nil {
+		return fmt.Errorf("failed to fetch bucket stats: %w", err)
+	}
+
+	for _, stat := range stats {
+		monthlyStats := BucketMonthlyStats{
+			BucketName:      stat.BucketName,
+			Year:            year,
+			Month:           month,
+			OperationCountA: stat.OperationCountA,
+			OperationCountB: stat.OperationCountB,
+		}
+
+		// 使用 UPSERT 逻辑：如果存在则更新，否则创建
+		if err := s.db.Where("bucket_name = ? AND year = ? AND month = ?",
+			stat.BucketName, year, month).
+			Assign(BucketMonthlyStats{
+				OperationCountA: stat.OperationCountA,
+				OperationCountB: stat.OperationCountB,
+			}).
+			FirstOrCreate(&monthlyStats).Error; err != nil {
+			return fmt.Errorf("failed to archive monthly stats for bucket %s: %w", stat.BucketName, err)
+		}
+	}
+
+	return nil
+}
+
+// GetMonthlyStats 获取指定月份的统计数据
+func (s *Service) GetMonthlyStats(year, month int) ([]BucketMonthlyStats, error) {
+	var stats []BucketMonthlyStats
+	if err := s.db.Where("year = ? AND month = ?", year, month).
+		Find(&stats).Error; err != nil {
+		return nil, fmt.Errorf("failed to fetch monthly stats: %w", err)
+	}
+	return stats, nil
+}
+
+// GetMonthlyStatsRange 获取指定时间范围的统计数据
+func (s *Service) GetMonthlyStatsRange(startYear, startMonth, endYear, endMonth int) ([]BucketMonthlyStats, error) {
+	var stats []BucketMonthlyStats
+	if err := s.db.Where("(year > ? OR (year = ? AND month >= ?)) AND (year < ? OR (year = ? AND month <= ?))",
+		startYear, startYear, startMonth, endYear, endYear, endMonth).
+		Order("year, month, bucket_name").
+		Find(&stats).Error; err != nil {
+		return nil, fmt.Errorf("failed to fetch monthly stats range: %w", err)
+	}
+	return stats, nil
+}
+
+// GetCurrentMonthStats 获取当前月份的实时统计（从 bucket_stats 计算）
+func (s *Service) GetCurrentMonthStats() ([]BucketMonthlyStats, error) {
+	now := time.Now()
+	year, month := now.Year(), int(now.Month())
+
+	// 获取上个月的归档数据
+	var lastMonthStats []BucketMonthlyStats
+	lastYear, lastMonth := year, month-1
+	if lastMonth == 0 {
+		lastMonth = 12
+		lastYear--
+	}
+
+	lastMonthMap := make(map[string]BucketMonthlyStats)
+	if err := s.db.Where("year = ? AND month = ?", lastYear, lastMonth).
+		Find(&lastMonthStats).Error; err == nil {
+		for _, stat := range lastMonthStats {
+			lastMonthMap[stat.BucketName] = stat
+		}
+	}
+
+	// 获取当前累计数据
+	var currentStats []BucketStats
+	if err := s.db.Find(&currentStats).Error; err != nil {
+		return nil, fmt.Errorf("failed to fetch current bucket stats: %w", err)
+	}
+
+	// 计算当前月份的增量
+	result := make([]BucketMonthlyStats, 0, len(currentStats))
+	for _, current := range currentStats {
+		lastMonth := lastMonthMap[current.BucketName]
+		result = append(result, BucketMonthlyStats{
+			BucketName:      current.BucketName,
+			Year:            year,
+			Month:           month,
+			OperationCountA: current.OperationCountA - lastMonth.OperationCountA,
+			OperationCountB: current.OperationCountB - lastMonth.OperationCountB,
+			UpdatedAt:       time.Now(),
+		})
+	}
+
+	return result, nil
+}
+
+// GetBucketMonthlyHistory 获取指定存储桶的月度历史统计
+func (s *Service) GetBucketMonthlyHistory(bucketName string, months int) ([]BucketMonthlyStats, error) {
+	var stats []BucketMonthlyStats
+	if err := s.db.Where("bucket_name = ?", bucketName).
+		Order("year DESC, month DESC").
+		Limit(months).
+		Find(&stats).Error; err != nil {
+		return nil, fmt.Errorf("failed to fetch bucket monthly history: %w", err)
+	}
+	return stats, nil
+}