diff --git a/models/bots/task_log.go b/models/bots/task_log.go
index 41949a8308..072108fdac 100644
--- a/models/bots/task_log.go
+++ b/models/bots/task_log.go
@@ -8,14 +8,15 @@ import (
 	"fmt"
 
 	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/timeutil"
 )
 
 // TaskLog represents a task's log, every task has a standalone table
 type TaskLog struct {
-	ID      int64
-	Content string             `xorm:"BINARY"`
-	Created timeutil.TimeStamp `xorm:"created"`
+	ID        int64
+	Timestamp timeutil.TimeStamp
+	Content   string `xorm:"LONGTEXT"`
 }
 
 func init() {
@@ -26,16 +27,16 @@ func GetTaskLogTableName(taskID int64) string {
 	return fmt.Sprintf("bots_task_log_%d", taskID)
 }
 
-// CreateTaskLog table for a build
-func CreateTaskLog(buildID int64) error {
+// CreateTaskLog table for a task
+func CreateTaskLog(taskID int64) error {
 	return db.GetEngine(db.DefaultContext).
-		Table(GetBuildLogTableName(buildID)).
-		Sync2(new(BuildLog))
+		Table(GetTaskLogTableName(taskID)).
+		Sync(new(TaskLog))
 }
 
 func GetTaskLogs(taskID, index, length int64) (logs []*TaskLog, err error) {
 	sess := db.GetEngine(db.DefaultContext).Table(GetBuildLogTableName(taskID)).
-		Where("id>=?", index)
+		Where("id>=?", index).OrderBy("id")
 
 	if length > 0 {
 		sess.Limit(int(length))
@@ -45,3 +46,36 @@ func GetTaskLogs(taskID, index, length int64) (logs []*TaskLog, err error) {
 
 	return
 }
+
+func InsertTaskLogs(taskID int64, logs []*TaskLog) (int64, error) {
+	if err := CreateTaskLog(taskID); err != nil {
+		return 0, err
+	}
+	table := GetTaskLogTableName(taskID)
+
+	// TODO: A more complete way to insert logs
+	// Be careful:
+	//   - the id of a log can be 0
+	//   - some logs may already exist in db
+	//   - if use exec, consider different databases
+	//   - the input should be ordered by id
+	//   - the ids should be continuously increasing
+	//   - the min id of input should be 1 + (the max id in db)
+
+	if len(logs) == 0 {
+		return 0, fmt.Errorf("no logs")
+	}
+	ack := logs[0].ID - 1
+
+	sess := db.GetEngine(db.DefaultContext)
+	for _, v := range logs {
+		_, err := sess.Exec(fmt.Sprintf("INSERT IGNORE INTO %s (id, timestamp, content) VALUES (?,?,?)", table), v.ID, v.Timestamp, []byte(v.Content))
+		if err != nil {
+			log.Error("insert log %d of task %d: %v", v.ID, taskID, err)
+			break
+		}
+		ack = v.ID
+	}
+
+	return ack, nil
+}
diff --git a/routers/api/bots/runner/runner.go b/routers/api/bots/runner/runner.go
index 3d35c94304..b6533d9918 100644
--- a/routers/api/bots/runner/runner.go
+++ b/routers/api/bots/runner/runner.go
@@ -17,7 +17,7 @@ import (
 	"code.gitea.io/gitea/models/repo"
 	"code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/json"
-	"code.gitea.io/gitea/modules/log"
+	"code.gitea.io/gitea/modules/timeutil"
 	runnerv1 "gitea.com/gitea/proto-go/runner/v1"
 	"gitea.com/gitea/proto-go/runner/v1/runnerv1connect"
 
@@ -180,11 +180,31 @@ func (s *Service) UpdateLog(
 ) (*connect.Response[runnerv1.UpdateLogResponse], error) {
 	res := connect.NewResponse(&runnerv1.UpdateLogResponse{})
 
-	// to debug
-	for i, row := range req.Msg.Rows {
-		log.Info("log[%v]: %v %v", req.Msg.Index+int64(i), row.Time.AsTime().Local().Format(time.RFC3339), row.Content)
+	if len(req.Msg.Rows) == 0 {
+		// TODO: should be 1 + the max id of stored log
+		res.Msg.AckIndex = req.Msg.Index
+		return res, nil
+	}
+
+	rowIndex := req.Msg.Index
+	rows := make([]*bots_model.TaskLog, len(req.Msg.Rows))
+	for i, v := range req.Msg.Rows {
+		rows[i] = &bots_model.TaskLog{
+			ID:        rowIndex + int64(i),
+			Timestamp: timeutil.TimeStamp(v.Time.AsTime().Unix()),
+			Content:   v.Content,
+		}
+	}
+
+	ack, err := bots_model.InsertTaskLogs(req.Msg.TaskId, rows)
+	if err != nil {
+		return nil, status.Errorf(codes.Internal, "insert task log: %v", err)
+	}
+	res.Msg.AckIndex = ack
+
+	if req.Msg.NoMore {
+		// TODO: transfer logs to storage from db
 	}
-	res.Msg.AckIndex = req.Msg.Index + int64(len(req.Msg.Rows))
 
 	return res, nil
 }