diff --git a/backend/model/setting.go b/backend/model/setting.go
new file mode 100644
index 00000000..3b546f68
--- /dev/null
+++ b/backend/model/setting.go
@@ -0,0 +1,45 @@
+package model
+
+import (
+	"crawlab/database"
+	"github.com/globalsign/mgo/bson"
+	"time"
+)
+
+type Setting struct {
+	Keyword  string
+	Document bson.Raw
+}
+
+func GetRawSetting(keyword string, pointer interface{}) error {
+	s, col := database.GetCol("settings")
+	defer s.Close()
+	var setting Setting
+	err := col.Find(bson.M{"keyword": keyword}).One(&setting)
+	if err != nil {
+		return err
+	}
+	return setting.Document.Unmarshal(pointer)
+}
+
+type DocumentMeta struct {
+	DocumentVersion  int
+	DocStructVersion int
+	UpdateTime       time.Time
+	CreateTime       time.Time
+	DeleteTime       time.Time
+}
+
+//demo
+type SecuritySetting struct {
+	EnableRegister   bool
+	EnableInvitation bool
+	DocumentMeta     `bson:"inline" json:"inline"`
+}
+
+func GetSecuritySetting() (SecuritySetting, error) {
+	var app SecuritySetting
+	err := GetRawSetting("security", &app)
+	return app, err
+
+}