Thailand has a proactive role Both in the establishment and development of ASEAN as an organization with great success. And the origin of the ASEAN. By an active role in the activities of ASEAN along. Also included are the push for ASEAN cooperation projects in various fields. The timely and consistent with the environment and international situation, such as having a key role in the establishment of the ASEAN Free Trade Area (ASEAN Free Trade Area) in 2535, the political and security cooperation in the Asia - Pacific region. or ARF- ASEAN regional Forum, a forum where users discuss regional security issues in the year 2537 cooperation treaty nuclear free zone in the region of Southeast Asia. The initiative to create a network of cooperation to mitigate the impact of the financial crisis in 2540