diff --git a/cmd/server/main.go b/cmd/server/main.go
index def68a5..86399fd 100644
--- a/cmd/server/main.go
+++ b/cmd/server/main.go
@@ -2,9 +2,11 @@ package main
 
 import (
 	"context"
+	"log"
 	"log/slog"
 	"os"
 	"os/signal"
+	"syscall"
 
 	"github.com/google/uuid"
 	"github.com/pkg/errors"
@@ -16,7 +18,9 @@ import (
 	"github.com/iotexproject/pebble-server/cmd/server/api"
 	"github.com/iotexproject/pebble-server/cmd/server/clients"
 	"github.com/iotexproject/pebble-server/cmd/server/commands"
+	"github.com/iotexproject/pebble-server/cmd/server/config"
 	"github.com/iotexproject/pebble-server/contexts"
+	"github.com/iotexproject/pebble-server/db"
 	"github.com/iotexproject/pebble-server/middlewares/alert"
 	"github.com/iotexproject/pebble-server/middlewares/blockchain"
 	"github.com/iotexproject/pebble-server/middlewares/crypto"
@@ -34,8 +38,8 @@ var (
 	CommitID string
 	Date     string
 
-	app    *confapp.AppCtx
-	config = &struct {
+	app     *confapp.AppCtx
+	config1 = &struct {
 		DryRun                          bool
 		MqttBroker                      *confmqtt.Broker
 		Database                        *database.Postgres
@@ -183,9 +187,19 @@ func Main() error {
 }
 
 func main() {
-	if err := app.Command.Execute(); err != nil {
-		app.PrintErrln(err)
+	cfg, err := config.Get()
+	if err != nil {
+		log.Fatal(errors.Wrap(err, "failed to get config"))
 	}
-	config.Blockchain.Close()
-	os.Exit(-1)
+	cfg.Print()
+	slog.Info("pebble server config loaded")
+
+	db, err := db.New(cfg.DatabaseDSN)
+	if err != nil {
+		log.Fatal(errors.Wrap(err, "failed to new db"))
+	}
+
+	done := make(chan os.Signal, 1)
+	signal.Notify(done, syscall.SIGINT, syscall.SIGTERM)
+	<-done
 }
diff --git a/db/account.go b/db/account.go
new file mode 100644
index 0000000..6bf3208
--- /dev/null
+++ b/db/account.go
@@ -0,0 +1,11 @@
+package db
+
+type Account struct {
+	ID     string `gorm:"primary_key"`
+	Name   string `gorm:"not null"`
+	Avatar string `gorm:"not null"`
+
+	OperationTimes
+}
+
+func (*Account) TableName() string { return "account" }
diff --git a/db/app.go b/db/app.go
new file mode 100644
index 0000000..e6e86c9
--- /dev/null
+++ b/db/app.go
@@ -0,0 +1,13 @@
+package db
+
+type App struct {
+	ID      string `gorm:"primary_key"`
+	Version string `gorm:"not null;default:''"`
+	Uri     string `gorm:"not null;default:''"`
+	Avatar  string `gorm:"not null;default:''"`
+	Content string `gorm:"not null;default:''"`
+
+	OperationTimes
+}
+
+func (*App) TableName() string { return "app" }
diff --git a/db/appv2.go b/db/appv2.go
new file mode 100644
index 0000000..260f25d
--- /dev/null
+++ b/db/appv2.go
@@ -0,0 +1,24 @@
+package db
+
+type AppV2 struct {
+	ID         string `gorm:"primary_key"`
+	Slug       string `gorm:"not null;default:''"`
+	Logo       string `gorm:"not null;default:''"`
+	Author     string `gorm:"not null;default:''"`
+	Status     string `gorm:"not null;default:''"`
+	Content    string `gorm:"not null;default:''"`
+	Data       string `gorm:"not null;default:'{}'"`
+	Previews   string `gorm:"not null;default:'[]'"`
+	Date       string `gorm:"not null;default:''"`
+	CreatedAt  string `gorm:"not null;default:''"`
+	UpdatedAt  string `gorm:"not null;default:''"`
+	URI        string `gorm:"not null;default:''"`
+	Category   int32  `gorm:"not null;default:0"`
+	DirectLink string `gorm:"not null;default:''"`
+	Order      int32  `gorm:"not null;default:0"`
+	Firmware   string `gorm:"not null;default:''"`
+
+	OperationTimes
+}
+
+func (*AppV2) TableName() string { return "app_v2" }
diff --git a/db/bank.go b/db/bank.go
new file mode 100644
index 0000000..c1929dc
--- /dev/null
+++ b/db/bank.go
@@ -0,0 +1,10 @@
+package db
+
+type Bank struct {
+	Address string `gorm:"primary_key"`
+	Balance string `gorm:"not null;default:'0'"`
+
+	OperationTimes
+}
+
+func (*Bank) TableName() string { return "bank" }
diff --git a/db/bank_record.go b/db/bank_record.go
new file mode 100644
index 0000000..2301a9e
--- /dev/null
+++ b/db/bank_record.go
@@ -0,0 +1,20 @@
+package db
+
+const (
+	BankRecodeDeposit int32 = iota
+	BankRecodeWithdraw
+	BankRecodePaid
+)
+
+type BankRecord struct {
+	ID        string `gorm:"primary_key"`
+	From      string `gorm:"not null;default:''"`
+	To        string `gorm:"not null;default:''"`
+	Amount    string `gorm:"not null;default:''"`
+	Timestamp int64  `gorm:"not null;default:0"`
+	Type      int32  `gorm:"not null;default:0"`
+
+	OperationTimes
+}
+
+func (*BankRecord) TableName() string { return "bank_record" }
diff --git a/db/device.go b/db/device.go
new file mode 100644
index 0000000..55a6100
--- /dev/null
+++ b/db/device.go
@@ -0,0 +1,34 @@
+package db
+
+const (
+	CREATED int32 = iota
+	PROPOSAL
+	CONFIRM
+)
+
+type Device struct {
+	ID                     string `gorm:"primary_key"`
+	Name                   string `gorm:"not null;default:''"`
+	Owner                  string `gorm:"not null;default:''"`
+	Address                string `gorm:"not null;default:''"`
+	Avatar                 string `gorm:"not null;default:''"`
+	Status                 int32  `gorm:"not null;default:0"`
+	Proposer               string `gorm:"not null;default:''"`
+	Firmware               string `gorm:"not null;default:''"`
+	Config                 string `gorm:"not null;default:''"`
+	TotalGas               int32  `gorm:"not null;default:0"`
+	BulkUpload             int32  `gorm:"not null;default:0"`
+	DataChannel            int32  `gorm:"not null;default:0"`
+	UploadPeriod           int32  `gorm:"not null;default:0"`
+	BulkUploadSamplingCnt  int32  `gorm:"not null;default:0"`
+	BulkUploadSamplingFreq int32  `gorm:"not null;default:0"`
+	Beep                   int32  `gorm:"not null;default:0"`
+	RealFirmware           string `gorm:"not null;default:''"`
+	State                  int32  `gorm:"not null;default:0"`
+	Type                   int32  `gorm:"not null;default:0"`
+	Configurable           bool   `gorm:"not null;default:0;default:true"`
+
+	OperationTimes
+}
+
+func (*Device) TableName() string { return "device" }
diff --git a/db/device_record.go b/db/device_record.go
new file mode 100644
index 0000000..c63b8bb
--- /dev/null
+++ b/db/device_record.go
@@ -0,0 +1,25 @@
+package db
+
+type DeviceRecord struct {
+	ID            string `gorm:"primary_key"`
+	Imei          string `gorm:"index:device_record_imei;not null"`
+	Operator      string `gorm:"not null"`
+	Snr           string `gorm:"not null;type:numeric(10,2);default:0"`
+	Vbat          string `gorm:"not null;type:numeric(10,2);default:0"`
+	GasResistance string `gorm:"not null;type:numeric(10,2);default:0"`
+	Temperature   string `gorm:"not null;type:numeric(10,2);default:0"`
+	Temperature2  string `gorm:"not null;type:numeric(10,2);default:0"`
+	Pressure      string `gorm:"not null;type:numeric(10,2);default:0"`
+	Humidity      string `gorm:"not null;type:numeric(10,2);default:0"`
+	Light         string `gorm:"not null;type:numeric(10,2);default:0"`
+	Gyroscope     string `gorm:"not null;default:''"`
+	Accelerometer string `gorm:"not null;default:''"`
+	Latitude      string `gorm:"not null;default:0"`
+	Longitude     string `gorm:"not null;default:0"`
+	Signature     string `gorm:"not null;default:''"`
+	Timestamp     int64  `gorm:"index:device_record_timestamp;not null;default:0"`
+
+	OperationTimes
+}
+
+func (*DeviceRecord) TableName() string { return "device_record" }
diff --git a/db/message.go b/db/message.go
new file mode 100644
index 0000000..33079f7
--- /dev/null
+++ b/db/message.go
@@ -0,0 +1,13 @@
+package db
+
+import "gorm.io/gorm"
+
+type Message struct {
+	gorm.Model
+	MessageID      string `gorm:"index:message_id,not null"`
+	ClientID       string `gorm:"index:message_fetch,not null,default:''"`
+	ProjectID      uint64 `gorm:"index:message_fetch,not null"`
+	ProjectVersion string `gorm:"index:message_fetch,not null,default:'0.0'"`
+	Data           []byte `gorm:"size:4096"`
+	InternalTaskID string `gorm:"index:internal_task_id,not null,default:''"`
+}
diff --git a/db/postgres.go b/db/postgres.go
new file mode 100644
index 0000000..fa342e4
--- /dev/null
+++ b/db/postgres.go
@@ -0,0 +1,35 @@
+package db
+
+import (
+	"github.com/pkg/errors"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
+
+type DB struct {
+	db *gorm.DB
+}
+
+func New(dsn string) (*DB, error) {
+	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{
+		Logger: logger.Default.LogMode(logger.Silent),
+	})
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to connect postgres")
+	}
+	if err := db.AutoMigrate(
+		&Account{},
+		&App{},
+		&AppV2{},
+		&Bank{},
+		&BankRecord{},
+		&Device{},
+		&DeviceRecord{},
+		&Task{},
+		&Message{},
+	); err != nil {
+		return nil, errors.Wrap(err, "failed to migrate model")
+	}
+	return &DB{db}, nil
+}
diff --git a/db/task.go b/db/task.go
new file mode 100644
index 0000000..f0a78d5
--- /dev/null
+++ b/db/task.go
@@ -0,0 +1,40 @@
+package db
+
+import (
+	"bytes"
+	"crypto/ecdsa"
+	"encoding/binary"
+
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/pkg/errors"
+	"gorm.io/gorm"
+)
+
+type Task struct {
+	gorm.Model
+	ProjectID      uint64 `gorm:"index:task_fetch,not null"`
+	InternalTaskID string `gorm:"index:internal_task_id,not null"`
+	MessageIDs     []byte `gorm:"not null"`
+	Signature      string `gorm:"not null,default:''"`
+}
+
+func (t *Task) Sign(sk *ecdsa.PrivateKey, msg *Message) error {
+	if msg.ProjectID != t.ProjectID {
+		return errors.New("unmatched project id")
+	}
+
+	buf := bytes.NewBuffer(nil)
+	_ = binary.Write(buf, binary.BigEndian, uint64(t.ID))
+	_ = binary.Write(buf, binary.BigEndian, t.ProjectID)
+	_, _ = buf.WriteString(msg.ClientID)
+	_, _ = buf.Write(crypto.Keccak256Hash(msg.Data).Bytes())
+
+	h := crypto.Keccak256Hash(buf.Bytes())
+	sig, err := crypto.Sign(h.Bytes(), sk)
+	if err != nil {
+		return err
+	}
+	t.Signature = hexutil.Encode(sig)
+	return nil
+}
diff --git a/db/util.go b/db/util.go
new file mode 100644
index 0000000..ef132ba
--- /dev/null
+++ b/db/util.go
@@ -0,0 +1,15 @@
+package db
+
+import "time"
+
+func NewOperationTimes() OperationTimes {
+	return OperationTimes{
+		CreatedAt: time.Now(),
+		UpdatedAt: time.Now(),
+	}
+}
+
+type OperationTimes struct {
+	CreatedAt time.Time `gorm:"not null"`
+	UpdatedAt time.Time `gorm:"not null"`
+}