diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..adf8f72
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,23 @@
+# ---> Go
+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+
diff --git a/model.go b/model.go
new file mode 100644
index 0000000..3f674b3
--- /dev/null
+++ b/model.go
@@ -0,0 +1,202 @@
+package model
+
+import (
+	"strconv"
+	"strings"
+	"time"
+
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	"qoobing.com/gomod/log"
+	"qoobing.com/gomod/redis"
+	"qoobing.com/gomod/database"
+)
+
+
+type Model struct {
+    DB         *gorm.DB
+    DbTxStatus DbTxStatus
+    Redis      redis.Conn
+    RedisPool  *redis.Pool
+}
+
+type DbTxStatus int
+const (
+    DBTX_STATUS_TX_NONE    DbTxStatus = 0
+    DBTX_STATUS_TX_DOING   DbTxStatus = 1
+    DBTX_STATUS_TX_SUCCESS DbTxStatus = 2
+    DBTX_STATUS_TX_FAILED  DbTxStatus = 3
+)
+
+var (
+	defaultDb         *database.Config 
+	defaultDsn        string
+	defaultDbDebug    bool
+	defaultGormDB     *gorm.DB
+	defaultRds        redis.Config
+	defaultRedis      *redis.Pool
+	defaultRedisDebug bool
+	defaultOptions  []Option
+)
+
+func NewModel() *Model {
+    if len(defaultOptions) == 0 {
+        panic("No defualt Database&Redis been configed")
+    } 
+    return NewModelWithOption(defaultOptions...)
+}
+
+func NewModelDefault() *Model {
+	return mdb.NewModelWithOption(OptOpenDefaultDatabase, OptOpenDefaultRedis)
+}
+
+func NewModelDefaultRedis() *Model {
+	return mdb.NewModelWithOption(OptOpenDefaultRedis)
+}
+
+func NewModelDefaultDatabase() *Model {
+	return mdb.NewModelWithOption(OptOpenDefaultDatabase)
+}
+
+func NewModelWithOption(options ...Option) *Model {
+    n := 0
+    m := Model{}
+    log.Debugf("Start NewModelWithOption...")
+    for _, option := range options {
+        n++
+        option(&m)
+    }
+    log.Debugf("Finish NewModelWithOption(with %d options)", n)
+    return &m
+}
+
+func (m *Model) Close() {
+    if m.Redis != nil {
+        m.Redis.Close()
+    }   
+    if m.DB == nil {
+        m.DbTxStatus = DBTX_STATUS_TX_NONE
+    } else if m.DbTxStatus == DBTX_STATUS_TX_DOING {
+        m.DB.Rollback()
+        m.DbTxStatus = DBTX_STATUS_TX_FAILED
+    }   
+}
+
+func (m *Model) Begin() {
+    if m.DB == nil {
+        panic("unreachable code, m.DB is uninitialized")
+    } else if m.DbTxStatus != DBTX_STATUS_TX_NONE {
+        panic("unreachable code, begin transaction towice???")
+    } else {
+        m.DbTxStatus = DBTX_STATUS_TX_DOING
+        m.DB = m.DB.Begin()
+    }
+}
+
+func (m *Model) Commit() error {
+    if m.DB == nil {
+        panic("unreachable code, m.DB is uninitialized")
+    } else if m.DbTxStatus != DBTX_STATUS_TX_DOING {
+        return nil 
+    } else if err := m.DB.Commit().Error; err != nil {
+        m.DbTxStatus = DBTX_STATUS_TX_FAILED
+        return err 
+    } else {
+        m.DbTxStatus = DBTX_STATUS_TX_SUCCESS
+        return nil 
+    }   
+}
+
+// Option is model's option
+type Option func(*Model)
+
+// OptOpenDefaultDatabase option function for open default database
+func OptOpenDefaultDatabase(m *Model) {
+	if defaultGormDB != nil {
+		m.DB = defaultGormDB
+	} else if db, err := gorm.Open(
+		postgres.New(postgres.Config{
+			DSN:                  defaultDsn,
+			PreferSimpleProtocol: true,
+		}), &gorm.Config{}); err != nil {
+		panic("DATABASE_OPEN_ERROR")
+	} else {
+		if defaultDbDebug {
+			m.DB = db.Debug()
+		} else {
+			m.DB = db
+		}
+		if sqlDB, err := m.DB.DB(); err != nil {
+			panic("DATABASE_OPEN_ERROR")
+		} else {
+			sqlDB.SetMaxIdleConns(3)
+			sqlDB.SetMaxOpenConns(10)
+			sqlDB.SetConnMaxLifetime(time.Minute)
+		}
+		defaultGormDB = m.DB
+	}
+	//TODO: check cocurrent
+	m.DB = m.DB.Session(&gorm.Session{QueryFields: true})
+	log.Debugf("Opt for open default database done")
+	return
+}
+
+// OptOpenDefaultRedisSentinelPool option function for open default redis sentinel
+func OptOpenDefaultRedis(m *Model) {
+	if defaultRedis != nil {
+		m.Redis = defaultRedis.Get()
+		m.RedisPool = defaultRedis
+	} else if pool := sentinel.NewPool(defaultRds); pool == nil {
+		panic("REDIS_ERROR")
+	} else {
+		defaultRedis = pool
+		m.Redis = defaultRedis.Get()
+		m.RedisPool = defaultRedis
+	}
+
+	log.Debugf("Opt for open default redis done")
+	return
+}
+
+// Init init default database config & redis config 
+func Init(defaultDb *database.Config, defaultRds *redis.Config){ 
+    defaultOptions = []Options{}
+
+    if defaultDb {
+    	// database init
+    	arrConfStr := []string{
+    		"host=" + defaultDb.Host,
+    		"port=" + strconv.Itoa(defaultDb.Port),
+    		"user=" + defaultDb.Username,
+    		"password=" + defaultDb.Password,
+    		"dbname=" + defaultDb.Dbname,
+    		defaultDb.ExtraParameters,
+    	}
+    	defaultDsn = strings.Join(arrConfStr, " ")
+    	defaultDbDebug = defaultDb.Debug
+    	// database debug
+    	if defaultDbDebug && len(defaultDb.Password) > 5 {
+    		p := defaultDb.Password
+    		l := len(p)
+    		secDefaultDsn := strings.Replace(defaultDsn, p[2:l-3], "*****", 1)
+    		log.Debugf("defaultDsn='%s'", secDefaultDsn)
+    	}
+
+        defaultOptions = append(defaultOptions, OptOpenDefaultDatabase)
+    }
+
+    if defaultRds != nil {
+	    // redis init
+	    defaultRds = coreRedis
+	    defaultRedisDebug = coreRedis.Debug
+        // redis debug
+	    if defaultRedisDebug && len(coreRedis.Password) > 5 {
+	    	p := coreRedis.Password
+	    	l := len(p)
+	    	secDefaultRds := defaultRds
+	    	secDefaultRds.Password = strings.Replace(p, p[2:l-3], "*****", 1)
+	    	log.PrintPretty("defaultRds=", secDefaultRds)
+	    }
+        defaultOptions = append(defaultOptions, OptOpenDefaultRedis)
+    }
+}