Based on the literature review, the paper shows that the research topics, research paradigms and methods are all changed in the area of "Chinese Studies" in North America in the past century. And the authors suggest that the expansion of research topics and the transformation of research methods, broadened the horizon of "Chinese Studies", it is crucial to the sustainable development of think tanks. The ability to contribute valuable and feasible research methods is one of the important factors for raising broad influence of think tanks.