In the past, international relation scholars analyze the interactions of states based on the theories of realism and idealism. Recently, scholars try to explain the reasons why there is conflict or cooperation in international society by reviewing the dimensions of concepts, ideas and culture which is so called constructivism. However, as the state boundaries fall away, the contact among states are getting closer. The subject those international relation theories explain has been shifted from states toward international regimes. Some scholars interpret the practice of these international regimes by applying regime theory. The emergence of international regimes not only means the coming era of globalization, but also stands for the difference between regime members and non regime members. In addition, many states believe that they would have higher status if they could join international regimes. Therefore, it is obvious that states look for any chance to become regime members. Since the withdrawal from the UN in 1971, Taiwan has been eager to join international regimes, especially those which require governmental representatives. However, due to the obstruction that Beijing government makes, Taiwan always fails to join international regimes. After striving for several years, Taiwan joined the World Trade Organization (WTO) which is one of the most important international economic regimes on January 1st 2002. As a member of WTO, when Taiwan does hard to fulfill its obligation, it is no doubt that Taiwan should possess equal status as other members and enjoy the interests that WTO brings to Taiwan. Yet, because China keeps protesting in WTO, it is not easy for Taiwan to carry out its duty and to perform as a good regime member. In WTO, the competition between Taiwan and China is everywhere and repeated. How Taiwan can find a way to solve this situation and how to protect its national interests by applying the institutional rules of WTO have become significant issues which should be taken seriously. Although the competing relation between Taipei and Beijing has not been better off after both became WTO members, in this research plan, we try to explore the possibility to see whether WTO could be a new arena where both members are able to cooperate in some issues. Furthermore, this papaer also wants to see if the economic interaction within WTO could help Taiwan and China restart dialogue in the near future. After the institutionalization and legalization, international regimes have gradually become the bridge among states. From internal perspective, regimes must defend their members’ interests, and solve the disputes and conflicts between members. Besides, international regimes have to play the role of the guard of international order from the external perspective. Furthermore, in small states’ point of view, how to interact with powerful states, gain maximum interests, and bring their influence into full play are those issues that they care about most. There is no common opinion in the international relation theories when seeing international regimes. However, even though the regime theory has developed since 1980s, it is still a question whether it is able to explain the interaction between Taiwan and China in international regimes. There might be something to be supplemented and needed more research and analysis. The core issues of my research plan are as follows: 1) the interaction between Taiwan and China within WTO: competition and cooperation; 2) what international relational theories and regime theory would say about the interaction between these two members in WTO: explanation and supplement. [ABSTRACT FROM AUTHOR]