diff --git a/num_test.go b/num_test.go
index fe6938f..be92925 100644
--- a/num_test.go
+++ b/num_test.go
@@ -5,13 +5,6 @@ import (
 	// "time"
 )
 
-func Test_Incrby(t *testing.T) {
-
-	c, err := Incrby("test_incrby", 10)
-	t.Log(c)
-	t.Log(err)
-
-}
 
 func Test_Decrby(t *testing.T) {
 
diff --git a/set.go b/set.go
index 6c86056..f85a481 100644
--- a/set.go
+++ b/set.go
@@ -74,3 +74,29 @@ func SIsmember(key string, field string, url ...string) (int64, error) {
 
 	return res.GetRet(), nil
 }
+
+
+/**
+ * 集合成员数
+ */
+func SCard(key string,url ...string) (int64, error) {
+
+	conn, _, err := Conn(url...)
+
+	if err != nil {
+		return 0, err
+	}
+	defer conn.Close()
+
+	req := &SMembersRequest{proto.String(key),nil}
+
+	res := &SSetResponse{}
+
+	err = conn.SCard(req, res)
+
+	if err != nil {
+		return 0, err
+	}
+
+	return res.GetRet(), nil
+}
\ No newline at end of file
diff --git a/set_test.go b/set_test.go
index be10b2f..a3b580e 100644
--- a/set_test.go
+++ b/set_test.go
@@ -19,3 +19,10 @@ func Test_SAdd(t *testing.T) {
 	t.Log(err)
 
 }
+
+func Test_SCard(t *testing.T){
+	res,err := SCard("test_article")
+
+	t.Log(res)
+	t.Log(err)
+}
\ No newline at end of file