This thesis from a constructivist approach to explore the neoliberal interdependence theory, the structural power of nationalism theory, in constructed out of Mainland China to control the East Asian system, how restricting contact sign, Taiwan and Thailand the opportunities of Economic Cooperation Agreement (ECA). Learned from the theory and data analysis, we know that Thailand is relatively dependent on the extent of Taiwan, and the interdependence of economic and social exchange behavior of multi-track each other. Although the basis of comparative advantage that favor positive contact Taiwan and Thailand signed the ECA and the optimum behavior of integration, limited to the new amendment to Article 190 of the Constitution of Thailand must get Congress to vote on the signing of an international agreement approved by the provisions, as well as the rise of Mainland China in East Asia caused by nationalism asymmetry interdependent the structural power constraints, resulting in consistent sign of Taiwan and Thailand ECA system failure, the phenomenon of zero, contrary to the rules of the market liberal institutionalism theory. How to break through Mainland China in the East Asian the structural power system constructed of path dependence, reversing the international status of Taiwan disadvantage, from the analysis of the theory, competence structure and fieldwork, Taiwan and Thailand signed ECA feasibility contact program with specific practices.