Moist logic is regarded as ”the peak” of logical studies in Ancient China. Yet the main achievement of Moist logic lies in what analytic philosophers like G. Ryle and P. Strawson would call ”informal logic”, rather than formal logic. Nowadays formal logic has developed into mathematical logic, which is commonly considered as an important technical instrument for analysis. The present paper is a research of Moist logic by employing mathematical logic as the analytical tool. The general theory of argumentation and the specific theories of term, proposition and reasoning in Moist logic are all scrutinized in this paper. showing that modern mathematical logic can be applied as a useful and powerful tool of analysis with respect to the subject concerned.