The China Study is important and has special meaning to Taiwan. The research topic is affected by three factors: International Politics, Cross Strait Relationship, and Domestic Politics of Taiwan and China. Generally speaking, all of these factors have changed in the 21st century. This paper tries to understand if the research topics of China Study have also changed. According to the data coding of the research papers from three Journals (Prospective Quarterly, Mainland China Studies, and Prospect & Exploration), this paper tries to discuss the research methods and research topics of China Study in the 21st century.