diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..485dee6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea
diff --git a/builder.go b/builder.go
new file mode 100644
index 0000000..9f1c567
--- /dev/null
+++ b/builder.go
@@ -0,0 +1,8 @@
+package goref
+
+import "reflect"
+
+func BuildSlice(t reflect.Type) any {
+	sliceT := reflect.SliceOf(t)
+	return reflect.MakeSlice(sliceT, 0, 0).Interface()
+}
diff --git a/builder_test.go b/builder_test.go
new file mode 100644
index 0000000..38a2946
--- /dev/null
+++ b/builder_test.go
@@ -0,0 +1,17 @@
+package goref_test
+
+import (
+	"gitter.top/common/goref"
+	"reflect"
+	"testing"
+)
+
+func TestBuildSliceStruct(t *testing.T) {
+	type T struct {
+		A string
+	}
+	var a T
+	at := reflect.TypeOf(a)
+	value := goref.BuildSlice(at)
+	t.Log(value.([]T))
+}
diff --git a/go.mod b/go.mod
index f01554b..fa5ef7a 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,11 @@
-module gitter.top/coco/goref
+module gitter.top/common/goref
 
-go 1.20
+go 1.21
+
+require github.com/stretchr/testify v1.8.4
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..fa4b6e6
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,10 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/keys.go b/keys.go
new file mode 100644
index 0000000..656e8cb
--- /dev/null
+++ b/keys.go
@@ -0,0 +1,27 @@
+package goref
+
+import "reflect"
+
+func ExistMapKey(val any, key string) bool {
+	vo := reflect.ValueOf(val)
+	if vo.Kind() == reflect.Ptr {
+		vo = vo.Elem()
+	}
+	if vo.Kind() != reflect.Map {
+		return false
+	}
+	getter := vo.MapIndex(reflect.ValueOf(key))
+	return getter.IsValid()
+}
+
+func ExistStructField(val any, field string) bool {
+	vo := reflect.ValueOf(val)
+	if vo.Kind() == reflect.Ptr {
+		vo = vo.Elem()
+	}
+	if vo.Kind() != reflect.Struct {
+		return false
+	}
+	getter := vo.FieldByName(field)
+	return getter.IsValid()
+}
diff --git a/type.go b/type.go
index a1b4dc3..c77c140 100644
--- a/type.go
+++ b/type.go
@@ -139,3 +139,101 @@ func IsChannel(val any) bool {
 	typeOf := reflect.TypeOf(val)
 	return typeOf.Kind() == reflect.Chan
 }
+
+func IsBaseStruct(val any) bool {
+	typeOf := reflect.TypeOf(val)
+	if typeOf.Kind() == reflect.Ptr {
+		typeOf = typeOf.Elem()
+	}
+	return typeOf.Kind() == reflect.Struct
+}
+
+func IsBaseMap(val any) bool {
+	typeOf := reflect.TypeOf(val)
+	if typeOf.Kind() == reflect.Ptr {
+		typeOf = typeOf.Elem()
+	}
+	return typeOf.Kind() == reflect.Map
+}
+
+func IsBaseString(val any) bool {
+	typeOf := reflect.TypeOf(val)
+	if typeOf.Kind() == reflect.Ptr {
+		typeOf = typeOf.Elem()
+	}
+	return typeOf.Kind() == reflect.String
+}
+
+func IsBaseSlice(val any) bool {
+	typeOf := reflect.TypeOf(val)
+	if typeOf.Kind() == reflect.Ptr {
+		typeOf = typeOf.Elem()
+	}
+	return typeOf.Kind() == reflect.Slice
+}
+
+func IsBaseArray(val any) bool {
+	typeOf := reflect.TypeOf(val)
+	if typeOf.Kind() == reflect.Ptr {
+		typeOf = typeOf.Elem()
+	}
+	return typeOf.Kind() == reflect.Array
+}
+
+func IsBaseList(val any) bool {
+	return IsBaseSlice(val) || IsBaseArray(val)
+}
+
+func GetListBaseType(val any) reflect.Type {
+	to := reflect.TypeOf(val)
+	if to.Kind() == reflect.Ptr {
+		to = to.Elem()
+	}
+	if to.Kind() != reflect.Slice && to.Kind() != reflect.Array {
+		panic("invalid type: " + to.String())
+	}
+	to = to.Elem()
+	if to.Kind() == reflect.Ptr {
+		to = to.Elem()
+	}
+	return to
+}
+
+func GetMapValueBaseType(val any) reflect.Type {
+	to := reflect.TypeOf(val)
+	if to.Kind() == reflect.Ptr {
+		to = to.Elem()
+	}
+	if to.Kind() != reflect.Map {
+		panic("invalid type: " + to.String())
+	}
+	to = to.Elem()
+	if to.Kind() == reflect.Ptr {
+		to = to.Elem()
+	}
+	return to
+}
+
+func GetBaseType(val any) reflect.Type {
+	to := reflect.TypeOf(val)
+	if to.Kind() == reflect.Ptr {
+		to = to.Elem()
+	}
+	if to.Kind() == reflect.Map || to.Kind() == reflect.Array || to.Kind() == reflect.Slice || to.Kind() == reflect.Chan {
+		to = to.Elem()
+	}
+	if to.Kind() == reflect.Ptr {
+		to = to.Elem()
+	}
+	return to
+}
+
+func IsBasicType(val any) bool {
+	rt := GetBaseType(val)
+	switch rt.Kind() {
+	case reflect.Chan, reflect.Struct, reflect.Array, reflect.Func, reflect.Map, reflect.Slice, reflect.Interface:
+		return false
+	default:
+		return true
+	}
+}
diff --git a/type_test.go b/type_test.go
new file mode 100644
index 0000000..402b288
--- /dev/null
+++ b/type_test.go
@@ -0,0 +1,34 @@
+package goref_test
+
+import (
+	"github.com/stretchr/testify/assert"
+	"gitter.top/common/goref"
+	"reflect"
+	"testing"
+)
+
+func TestIsBaseStruct(t *testing.T) {
+	type T struct{}
+	var a T
+	t.Log(goref.IsBaseStruct(a))
+	var list any = []T{}
+	t.Log(reflect.TypeOf(list))
+}
+
+func TestToInterfaces(t *testing.T) {
+	type T string
+	var list any = []T{
+		"hello",
+		"world",
+	}
+	t.Log(goref.ToInterfaces(list))
+}
+
+func TestGetBaseType(t *testing.T) {
+	var ch = make(chan int, 5)
+	assert.EqualValues(t, reflect.Int, goref.GetBaseType(ch).Kind())
+	var slice []string
+	assert.EqualValues(t, reflect.String, goref.GetBaseType(slice).Kind())
+	var m map[string]struct{}
+	assert.EqualValues(t, reflect.Struct, goref.GetBaseType(m).Kind())
+}
diff --git a/value.go b/value.go
new file mode 100644
index 0000000..ebd2082
--- /dev/null
+++ b/value.go
@@ -0,0 +1,160 @@
+package goref
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+func ToString(val any) (string, bool) {
+	vo := reflect.ValueOf(val)
+	if vo.Kind() == reflect.Ptr {
+		vo = vo.Elem()
+	}
+	if vo.Kind() == reflect.String {
+		return vo.String(), true
+	}
+	return "", false
+}
+
+func ToStrings(val any) ([]string, bool) {
+	vo := reflect.ValueOf(val)
+	if vo.Kind() == reflect.Ptr {
+		vo = vo.Elem()
+	}
+	if vo.Kind() == reflect.Slice || vo.Kind() == reflect.Array {
+		var list []string
+		for i := 0; i < vo.Len(); i++ {
+			val := vo.Index(i).Interface()
+			valVo := reflect.ValueOf(val)
+			if valVo.Kind() == reflect.Ptr {
+				valVo = valVo.Elem()
+			}
+			if valVo.Kind() == reflect.String {
+				list = append(list, valVo.String())
+			}
+		}
+		return list, true
+	}
+	return nil, false
+}
+
+func ToInterfaces(val any) ([]interface{}, bool) {
+	vo := reflect.ValueOf(val)
+	if vo.Kind() == reflect.Ptr {
+		vo = vo.Elem()
+	}
+	if vo.Len() == 0 {
+		return nil, false
+	}
+	var result []interface{}
+	for i := 0; i < vo.Len(); i++ {
+		result = append(result, vo.Index(i).Interface())
+	}
+	return result, true
+}
+
+type tagger struct {
+	tag       string
+	omitempty bool
+}
+
+func (t *tagger) merge() {
+	if t.tag == "" {
+		t.tag = "-"
+	}
+}
+
+type taggerOption func(*tagger)
+
+func WithTag(tag string) taggerOption {
+	return func(tager *tagger) {
+		tager.tag = tag
+	}
+}
+
+func WithOmitempty(omit bool) taggerOption {
+	return func(tager *tagger) {
+		tager.omitempty = omit
+	}
+}
+
+func StructToMap(val any, tagOpts ...taggerOption) (map[string]interface{}, error) {
+	vo := reflect.ValueOf(val)
+	if vo.Kind() == reflect.Ptr {
+		vo = vo.Elem()
+	}
+	if vo.Kind() != reflect.Struct {
+		return nil, fmt.Errorf("val type not struct")
+	}
+	var data = make(map[string]interface{})
+	var tagger = new(tagger)
+	for _, opt := range tagOpts {
+		opt(tagger)
+	}
+	tagger.merge()
+	for i := 0; i < vo.NumField(); i++ {
+		vf := vo.Field(i)
+		if tagger.omitempty && vf.IsZero() {
+			continue
+		}
+		key := vo.Type().Field(i).Tag.Get(tagger.tag)
+		if key == "" {
+			key = vo.Type().Field(i).Name
+		}
+		if strings.Contains(key, ",omitempty") {
+			key = strings.Replace(key, ",omitempty", "", 1)
+		}
+		data[key] = vf.Interface()
+	}
+	return data, nil
+}
+
+// SliceStructToMap slice struct to map, field as key
+// value type []struct, bind type *map[string]*struct
+func SliceStructToMap(value, bind any, field string) error {
+	// bind type check
+	if GetListBaseType(value) != GetMapValueBaseType(bind) {
+		return fmt.Errorf("struct type no match map type")
+	}
+
+	vo := reflect.ValueOf(value)
+	if vo.Kind() == reflect.Ptr {
+		vo = vo.Elem()
+	}
+	if vo.Kind() != reflect.Slice && vo.Kind() != reflect.Array {
+		return fmt.Errorf("val type not array or slice: " + vo.String())
+	}
+
+	bo := reflect.ValueOf(bind)
+	if bo.Kind() == reflect.Ptr {
+		bo = bo.Elem()
+	}
+	if bo.Kind() != reflect.Map {
+		return fmt.Errorf("invalid map type")
+	}
+	if !bo.CanSet() {
+		return fmt.Errorf("bind map must be initialized")
+	}
+	boKey := bo.Type().Key()
+	boVal := bo.Type().Elem()
+	bo.Set(reflect.MakeMap(reflect.MapOf(boKey, boVal)))
+
+	for i := 0; i < vo.Len(); i++ {
+		t := vo.Index(i)
+		if t.Kind() == reflect.Ptr {
+			t = t.Elem()
+		}
+		idxField := t.FieldByName(field)
+		if idxField.Kind() == reflect.Invalid {
+			continue
+		}
+		idxVal := vo.Index(i)
+		if boVal.Kind() == reflect.Ptr {
+			bo.SetMapIndex(idxField, idxVal.Addr())
+		} else {
+			bo.SetMapIndex(idxField, idxVal)
+		}
+	}
+	return nil
+}
diff --git a/value_test.go b/value_test.go
new file mode 100644
index 0000000..3c4cf65
--- /dev/null
+++ b/value_test.go
@@ -0,0 +1,31 @@
+package goref_test
+
+import (
+	"github.com/stretchr/testify/assert"
+	"gitter.top/common/goref"
+	"testing"
+)
+
+func TestSliceStructToMap(t *testing.T) {
+	type T struct {
+		Id string
+	}
+	var a []T
+	a = append(a, T{
+		Id: "1",
+	})
+	a = append(a, T{
+		Id: "2",
+	})
+	a = append(a, T{
+		Id: "3",
+	})
+	a = append(a, T{
+		Id: "4",
+	})
+
+	var bind = make(map[string]T)
+	err := goref.SliceStructToMap(a, &bind, "Id")
+	assert.NoError(t, err)
+	t.Logf("map: %#v", bind["1"])
+}