Abstract: There are connections and differences among the study of Tusi,Tusi system and Tusi culture.The study of Tusi is a specialized study on the practice of Tusi system.Whether a research field could be called a study or not depends on its internal factors and external conditions.Being important,unique,extensive and realistic in its research object,the research of Tusi has a profound foundation to form a study.The status of Tusi research,whether in terms of research history or development tendency,has shown mature external conditions.Therefore,the study of Tusi will appear inevitably,which calls for a specialized study and multidisciplinary participation.

Key words: the study of Tusi, inevitability；necessity, evaluation course, development tendency