In the past years, our government are classified in Cabinetal System. But recently it was identified as "dual executive system", especially as the "cohabitation" in the Fifth Republic of France. According to the documentary constitution, the Executive Yuan holds the highest executive status, and responsible to the Legislative Yuan. Through the President acts closely with the Premier, and appointing the Premier, he is not the head of the Executive department yet. Our government should be classified in one model of Cabinetal System. Thereare some limits in breakthrough to the Presidential System. In France, the "cohabitation" in regarded as abnormal now, either the Presidential System or Cabinetal System is the essential of governmental system. We should clearly spell out what it really is also. Then we can further to reform and develop it.