diff --git a/crontab.go b/crontab.go
new file mode 100644
index 0000000..92310ac
--- /dev/null
+++ b/crontab.go
@@ -0,0 +1,15 @@
+package crontabex
+
+import "time"
+
+// ICrontab 时间到
+type ICrontab interface {
+	TimeIsUp() bool
+	NextTime() time.Time
+	Set(...interface{}) // 默认不忽略
+	Get(...interface{})
+}
+
+// Crontab
+type Crontab struct {
+}
diff --git a/crontab_test.go b/crontab_test.go
new file mode 100644
index 0000000..81d21f5
--- /dev/null
+++ b/crontab_test.go
@@ -0,0 +1,7 @@
+package crontabex
+
+import "testing"
+
+func TestCrontabex(t *testing.T) {
+
+}
diff --git a/plan_time.go b/plan_time.go
new file mode 100644
index 0000000..eff9021
--- /dev/null
+++ b/plan_time.go
@@ -0,0 +1,10 @@
+package crontabex
+
+// PlanTime
+type PlanTime struct {
+}
+
+// TrieTime
+type TrieTime struct {
+	everyYear int
+}