diff --git a/f8/timer.cc b/f8/timer.cc
new file mode 100644
index 0000000..6fca259
--- /dev/null
+++ b/f8/timer.cc
@@ -0,0 +1,106 @@
+#include <a8/a8.h>
+
+#include <f8/f8.h>
+
+#include <f8/timer.h>
+
+namespace f8
+{
+
+    Attacher::Attacher()
+    {
+
+    }
+
+    void Timer::Init()
+    {
+
+    }
+
+    void Timer::UnInit()
+    {
+
+    }
+
+    bool Timer::Initialized()
+    {
+
+    }
+
+    void Timer::Update()
+    {
+
+    }
+
+    void Timer::SetTimeout(int expire_time, a8::TimerCb cb)
+    {
+
+    }
+
+    void Timer::SetTimeoutEx(int expire_time, a8::TimerCb cb, Attacher* attacher)
+    {
+
+    }
+
+    TimerWp Timer::SetTimeoutWp(int expire_time, a8::TimerCb cb)
+    {
+
+    }
+
+    TimerWp Timer::SetTimeoutWpEx(int expire_time, a8::TimerCb cb, Attacher* attacher)
+    {
+
+    }
+
+    void Timer::SetInterval(int expire_time, a8::TimerCb cb)
+    {
+
+    }
+
+    void Timer::SetIntervalEx(int expire_time, a8::TimerCb cb, Attacher* attacher)
+    {
+
+    }
+
+    TimerWp Timer::SetIntervalWp(int expire_time, a8::TimerCb cb)
+    {
+
+    }
+
+    TimerWp Timer::SetIntervalWpEx(int expire_time, a8::TimerCb cb, Attacher* attacher)
+    {
+
+    }
+
+    void Timer::FireEvent(TimerWp& timer_wp, int event, a8::Args* args)
+    {
+
+    }
+
+    void Timer::ModifyTime(TimerWp& timer_wp, int expire_time)
+    {
+
+    }
+
+    void Timer::Delete(TimerWp& timer_wp)
+    {
+
+    }
+
+    long long Timer::GetRemainTime(TimerWp& timer_wp)
+    {
+
+
+    }
+
+    void Timer::DeleteCurrentTimer()
+    {
+
+    }
+
+    bool Timer::IsRunning()
+    {
+
+    }
+
+}
diff --git a/f8/timer.h b/f8/timer.h
new file mode 100644
index 0000000..be215f5
--- /dev/null
+++ b/f8/timer.h
@@ -0,0 +1,66 @@
+#pragma once
+
+#include <a8/xtimer.h>
+#include <a8/singleton.h>
+
+namespace f8
+{
+    class TimerWp
+    {
+    public:
+        TimerWp(a8::XTimerWp wp): p_(wp) {};
+        bool expired() { return p_.expired();};
+        auto&& lock() { return p_.lock(); };
+
+    private:
+        a8::XTimerWp p_;
+        friend class Timer;
+    };
+
+    class Attacher
+    {
+    public:
+        Attacher();
+        void ClearTimerList() { p_.ClearTimerList(); };
+
+    private:
+        a8::Attacher p_;
+        friend class Timer;
+    };
+
+    class Timer : public a8::Singleton<Timer>
+    {
+
+    private:
+        Timer() {};
+        friend class a8::Singleton<Timer>;
+
+    public:
+        void Init();
+        void UnInit();
+        bool Initialized();
+        void Update();
+
+        void SetTimeout(int expire_time, a8::TimerCb cb);
+        void SetTimeoutEx(int expire_time, a8::TimerCb cb, Attacher* attacher);
+        TimerWp SetTimeoutWp(int expire_time, a8::TimerCb cb);
+        TimerWp SetTimeoutWpEx(int expire_time, a8::TimerCb cb, Attacher* attacher);
+
+        void SetInterval(int expire_time, a8::TimerCb cb);
+        void SetIntervalEx(int expire_time, a8::TimerCb cb, Attacher* attacher);
+        TimerWp SetIntervalWp(int expire_time, a8::TimerCb cb);
+        TimerWp SetIntervalWpEx(int expire_time, a8::TimerCb cb, Attacher* attacher);
+
+        void FireEvent(TimerWp& timer_wp, int event, a8::Args* args);
+        void ModifyTime(TimerWp& timer_wp, int expire_time);
+        void Delete(TimerWp& timer_wp);
+        long long GetRemainTime(TimerWp& timer_wp);
+        void DeleteCurrentTimer();
+        bool IsRunning();
+
+    private:
+        bool initialized_ = false;
+        a8::XTimer xtimer_;
+    };
+
+}