The purpose of this paper is to review the methodologies of fuzzy theory in social science. Fuzzy theory is provided by L. A. Zadeh and it has been widey used in engineering for forty years. In recent years, fuzzy theory is gradually used in the field of social science. Therefore, it is essential to offer the review on methodologies of fuzzy theory in social science. First, the author discusses the foundations and viewpoints of fuzzy theory for social science. Second, methodologies of fuzzy theory on clustering, computations of linguistics, decision-making, evaluation, and quantitative parameters are discussed. Based on these review, the author provide some suggestions for fuzzy theory methodology in social science.