The main theme of this essay : First chapter, constructs the essay’s model. Including research motive, purpose, questions, research review and so on. In chapter 2, Including policy change theory and relative theory:(1) pluralism; (2) elitism; (3) advocacy coalition framework; (4) garbage can model (5) policy window (6) Zahariadis’ theory about policy window (7) Organization evolving. Chapter 3: the change of Taiwan and China’s relation, including the background from KMT moved to Taiwan until now. Then, in chapter 4, it is to analyze the factors about economic and trade policy of Taiwan toward China. Finally, it is conclusion and advise of this essay in chapter 5.