diff --git a/pkg/apiserver/infrastructure/datastore/mongodb/mongodb.go b/pkg/apiserver/infrastructure/datastore/mongodb/mongodb.go
index 705e1dedd..30482afbd 100644
--- a/pkg/apiserver/infrastructure/datastore/mongodb/mongodb.go
+++ b/pkg/apiserver/infrastructure/datastore/mongodb/mongodb.go
@@ -275,7 +275,7 @@ func (m *mongodb) Count(ctx context.Context, entity datastore.Entity, filterOpti
 	if entity.Index() != nil {
 		for k, v := range entity.Index() {
 			filter = append(filter, bson.E{
-				Key:   k,
+				Key:   strings.ToLower(k),
 				Value: v,
 			})
 		}
diff --git a/pkg/apiserver/infrastructure/datastore/mongodb/mongodb_test.go b/pkg/apiserver/infrastructure/datastore/mongodb/mongodb_test.go
index 93b97933d..a108f88ab 100644
--- a/pkg/apiserver/infrastructure/datastore/mongodb/mongodb_test.go
+++ b/pkg/apiserver/infrastructure/datastore/mongodb/mongodb_test.go
@@ -232,6 +232,11 @@ var _ = Describe("Test mongodb datastore driver", func() {
 		}})
 		Expect(err).ShouldNot(HaveOccurred())
 		Expect(count).Should(Equal(int64(3)))
+
+		app.Name = "kubevela-app-3"
+		count, err = mongodbDriver.Count(context.TODO(), &app, &datastore.FilterOptions{})
+		Expect(err).ShouldNot(HaveOccurred())
+		Expect(count).Should(Equal(int64(1)))
 	})
 
 	It("Test isExist function", func() {