With the development of economic globalization, the threat of international financial crisis is rising. In order to address the challenge of financial crisis, the regional financial cooperation is becoming important mechanism for political elite in East Asia. Although Taiwan has important status of international economics and trade in East Asia and close economic and trade relations with China, but it is still difficult for Taiwan to join East Asia financial cooperation due to Cross-Strait political factor. This thesis analyses the political consensus of political elite in East Asia through the perspective of ¡§Neo-functionalism¡¨ on the impact of two stages of East Asia financial cooperation after international financial crisis in 1997 and 2008, and on the difficulty for Taiwan to take part in regional financial cooperation of ASEAN+3 with China¡¦s increasing political and economic influence in East Asia. Therefore this thesis analyses above issues for providing advices to Taiwan government regarding policymaking on participation in East Asia financial cooperation.