diff --git a/internal/database/audit.go b/internal/database/audit.go
new file mode 100644
index 00000000..062d3f36
--- /dev/null
+++ b/internal/database/audit.go
@@ -0,0 +1,209 @@
+package database
+
+import (
+	"encoding/json"
+	"errors"
+	"strings"
+	"time"
+)
+
+// AuditLog platform operation audit record.
+type AuditLog struct {
+	ID           string                 `json:"id"`
+	CreatedAt    time.Time              `json:"createdAt"`
+	Level        string                 `json:"level"`
+	Category     string                 `json:"category"`
+	Action       string                 `json:"action"`
+	Result       string                 `json:"result"`
+	Actor        string                 `json:"actor"`
+	SessionHint  string                 `json:"sessionHint,omitempty"`
+	ClientIP     string                 `json:"clientIp,omitempty"`
+	UserAgent    string                 `json:"userAgent,omitempty"`
+	ResourceType string                 `json:"resourceType,omitempty"`
+	ResourceID   string                 `json:"resourceId,omitempty"`
+	Message      string                 `json:"message"`
+	Detail       map[string]interface{} `json:"detail,omitempty"`
+}
+
+// ListAuditLogsFilter query parameters.
+type ListAuditLogsFilter struct {
+	Level        string
+	Category     string
+	Action       string
+	Result       string
+	Query        string
+	ResourceType string
+	ResourceID   string
+	Since        *time.Time
+	Until        *time.Time
+	Limit        int
+	Offset       int
+}
+
+func buildAuditLogsWhere(filter ListAuditLogsFilter) (string, []interface{}) {
+	conditions := []string{"1=1"}
+	args := []interface{}{}
+	if filter.Level != "" {
+		conditions = append(conditions, "level = ?")
+		args = append(args, filter.Level)
+	}
+	if filter.Category != "" {
+		conditions = append(conditions, "category = ?")
+		args = append(args, filter.Category)
+	}
+	if filter.Action != "" {
+		conditions = append(conditions, "action = ?")
+		args = append(args, filter.Action)
+	}
+	if filter.Result != "" {
+		conditions = append(conditions, "result = ?")
+		args = append(args, filter.Result)
+	}
+	if filter.ResourceType != "" {
+		conditions = append(conditions, "resource_type = ?")
+		args = append(args, filter.ResourceType)
+	}
+	if filter.ResourceID != "" {
+		conditions = append(conditions, "resource_id = ?")
+		args = append(args, filter.ResourceID)
+	}
+	if filter.Since != nil {
+		conditions = append(conditions, "created_at >= ?")
+		args = append(args, *filter.Since)
+	}
+	if filter.Until != nil {
+		conditions = append(conditions, "created_at <= ?")
+		args = append(args, *filter.Until)
+	}
+	if q := strings.TrimSpace(filter.Query); q != "" {
+		like := "%" + q + "%"
+		conditions = append(conditions, "(message LIKE ? OR resource_id LIKE ? OR action LIKE ? OR category LIKE ?)")
+		args = append(args, like, like, like, like)
+	}
+	return strings.Join(conditions, " AND "), args
+}
+
+// AppendAuditLog inserts one audit row.
+func (db *DB) AppendAuditLog(row *AuditLog) error {
+	if row == nil {
+		return errors.New("audit log is nil")
+	}
+	if strings.TrimSpace(row.ID) == "" {
+		return errors.New("audit id is required")
+	}
+	if row.CreatedAt.IsZero() {
+		row.CreatedAt = time.Now()
+	}
+	if strings.TrimSpace(row.Level) == "" {
+		row.Level = "info"
+	}
+	detailJSON := ""
+	if len(row.Detail) > 0 {
+		if b, err := json.Marshal(row.Detail); err == nil {
+			detailJSON = string(b)
+		}
+	}
+	query := `
+		INSERT INTO audit_logs (
+			id, created_at, level, category, action, result, actor, session_hint,
+			client_ip, user_agent, resource_type, resource_id, message, detail_json
+		) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+	`
+	_, err := db.Exec(query,
+		row.ID, row.CreatedAt, row.Level, row.Category, row.Action, row.Result,
+		row.Actor, row.SessionHint, row.ClientIP, row.UserAgent,
+		row.ResourceType, row.ResourceID, row.Message, detailJSON,
+	)
+	return err
+}
+
+// GetAuditLogByID returns one row.
+func (db *DB) GetAuditLogByID(id string) (*AuditLog, error) {
+	id = strings.TrimSpace(id)
+	if id == "" {
+		return nil, errors.New("id is required")
+	}
+	query := `
+		SELECT id, created_at, level, category, action, result, actor,
+			COALESCE(session_hint, ''), COALESCE(client_ip, ''), COALESCE(user_agent, ''),
+			COALESCE(resource_type, ''), COALESCE(resource_id, ''), message, COALESCE(detail_json, '')
+		FROM audit_logs WHERE id = ?
+	`
+	var row AuditLog
+	var detailJSON string
+	err := db.QueryRow(query, id).Scan(
+		&row.ID, &row.CreatedAt, &row.Level, &row.Category, &row.Action, &row.Result, &row.Actor,
+		&row.SessionHint, &row.ClientIP, &row.UserAgent,
+		&row.ResourceType, &row.ResourceID, &row.Message, &detailJSON,
+	)
+	if err != nil {
+		return nil, err
+	}
+	if detailJSON != "" {
+		_ = json.Unmarshal([]byte(detailJSON), &row.Detail)
+	}
+	return &row, nil
+}
+
+// CountAuditLogs counts rows matching filter.
+func (db *DB) CountAuditLogs(filter ListAuditLogsFilter) (int64, error) {
+	where, args := buildAuditLogsWhere(filter)
+	query := `SELECT COUNT(*) FROM audit_logs WHERE ` + where
+	var n int64
+	err := db.QueryRow(query, args...).Scan(&n)
+	return n, err
+}
+
+// ListAuditLogs lists audit rows newest first.
+func (db *DB) ListAuditLogs(filter ListAuditLogsFilter) ([]*AuditLog, error) {
+	where, args := buildAuditLogsWhere(filter)
+	limit := filter.Limit
+	if limit <= 0 || limit > 500 {
+		limit = 50
+	}
+	offset := filter.Offset
+	if offset < 0 {
+		offset = 0
+	}
+	query := `
+		SELECT id, created_at, level, category, action, result, actor,
+			COALESCE(session_hint, ''), COALESCE(client_ip, ''), COALESCE(user_agent, ''),
+			COALESCE(resource_type, ''), COALESCE(resource_id, ''), message, COALESCE(detail_json, '')
+		FROM audit_logs
+		WHERE ` + where + `
+		ORDER BY created_at DESC
+		LIMIT ? OFFSET ?
+	`
+	args = append(args, limit, offset)
+	rows, err := db.Query(query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var list []*AuditLog
+	for rows.Next() {
+		var row AuditLog
+		var detailJSON string
+		if err := rows.Scan(
+			&row.ID, &row.CreatedAt, &row.Level, &row.Category, &row.Action, &row.Result, &row.Actor,
+			&row.SessionHint, &row.ClientIP, &row.UserAgent,
+			&row.ResourceType, &row.ResourceID, &row.Message, &detailJSON,
+		); err != nil {
+			continue
+		}
+		if detailJSON != "" {
+			_ = json.Unmarshal([]byte(detailJSON), &row.Detail)
+		}
+		list = append(list, &row)
+	}
+	return list, rows.Err()
+}
+
+// DeleteAuditLogsBefore removes rows older than cutoff.
+func (db *DB) DeleteAuditLogsBefore(cutoff time.Time) (int64, error) {
+	res, err := db.Exec(`DELETE FROM audit_logs WHERE created_at < ?`, cutoff)
+	if err != nil {
+		return 0, err
+	}
+	return res.RowsAffected()
+}
diff --git a/internal/database/database.go b/internal/database/database.go
index 6321e1a5..26d44fd6 100644
--- a/internal/database/database.go
+++ b/internal/database/database.go
@@ -387,6 +387,24 @@ func (db *DB) initTables() error {
 		created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
 	);`
 
+	createAuditLogsTable := `
+	CREATE TABLE IF NOT EXISTS audit_logs (
+		id TEXT PRIMARY KEY,
+		created_at DATETIME NOT NULL,
+		level TEXT NOT NULL DEFAULT 'info',
+		category TEXT NOT NULL,
+		action TEXT NOT NULL,
+		result TEXT NOT NULL,
+		actor TEXT NOT NULL DEFAULT 'admin',
+		session_hint TEXT,
+		client_ip TEXT,
+		user_agent TEXT,
+		resource_type TEXT,
+		resource_id TEXT,
+		message TEXT NOT NULL,
+		detail_json TEXT
+	);`
+
 	createC2ProfilesTable := `
 	CREATE TABLE IF NOT EXISTS c2_profiles (
 		id TEXT PRIMARY KEY,
@@ -445,6 +463,10 @@ func (db *DB) initTables() error {
 	CREATE INDEX IF NOT EXISTS idx_c2_events_created_at ON c2_events(created_at);
 	CREATE INDEX IF NOT EXISTS idx_c2_events_category ON c2_events(category);
 	CREATE INDEX IF NOT EXISTS idx_c2_events_session ON c2_events(session_id);
+	CREATE INDEX IF NOT EXISTS idx_audit_logs_created_at ON audit_logs(created_at);
+	CREATE INDEX IF NOT EXISTS idx_audit_logs_category ON audit_logs(category);
+	CREATE INDEX IF NOT EXISTS idx_audit_logs_action ON audit_logs(action);
+	CREATE INDEX IF NOT EXISTS idx_audit_logs_result ON audit_logs(result);
 	`
 
 	if _, err := db.Exec(createConversationsTable); err != nil {
@@ -514,6 +536,10 @@ func (db *DB) initTables() error {
 		return fmt.Errorf("创建webshell_connection_states表失败: %w", err)
 	}
 
+	if _, err := db.Exec(createAuditLogsTable); err != nil {
+		return fmt.Errorf("创建audit_logs表失败: %w", err)
+	}
+
 	for tableName, ddl := range map[string]string{
 		"c2_listeners": createC2ListenersTable,
 		"c2_sessions":  createC2SessionsTable,