The purpose of this research is to study the role of Overseas Chinese which is aimed to the field of economy. The main objective is to achieve a better understand the economic role of Overseas Chinese in Thailand since the establishment of diplomatic relations of Thailand and China. And to achieve understanding and consensus about the foreign policy of China and Thailand which will affect the increasing in economic role of Overseas Chinese in Thailand.
The scope of research is studied about the earlier and later establishment of diplomatic relations of Thailand and China since 1 July 1975 to 1992. Because that period is the end of cold war, so it results in conduct of foreign policy is more obvious, by the way, it reflects the difficult and important of Overseas Chinese against economic role in that time. This research consists of Overseas Chinese history, foreign policy in Thailand, relationship of Thailand and China, and the role of Overseas Chinese in Thailand, which utilize the theory to apply in cultural adaptation, cultural assimilation and cultural pluralism to attribute the behavior of Overseas Chinese in Thailand. Learning the society and culture, which will leads to recognition as a part of Thai society and also result in increasing of economic role of Overseas Chinese in Thailand.