The objective of this research is to collect, analyze, interpret and synthesize the body of knowledge on Tai political systems for the development of future research programs. Research questions were set : What are existing significant research studies on the Tai political system? What are the conceptual and methodological approaches used by researchers? Who are in the networks of scholars in various countries working on this topic, their interest and inter-communication? What are the characteristics of Tai political systems? and How comprehensive is the researcher with regards to reconstruction of knowledge on the Tai political system. Which areas have been efficienctly covered and which need further study? Three steps of methodology are used (1) Collection of information : research reports, studies and papers on Tai political systems written in Thai, English, French and other languages from libraries of the other Institutes. (2) Assessment of the state-of-the-art : major pieces of work were assessed, screened and analyzed, compared with regard to their conceptual and methodological approaches used by nationality of scholars and by ethnic Tai groups, and assess the overall paradigm of those work. (3) Discussion and reconstruction of the knowledge, and recommendations for future studies. Recommendations are : On future research areas it was recommended that future research on Tai political systems should include (1) the legal systems and major laws of the Tais, (2) political systems of indigenous groups and their interrelationships with the Tais, (3) the linkages between the Ban/ the muang with the muang luong (capital) or the center of power and the development of the monarchy institution, (4) the dating of Tai kingdoms and the development of Tai states in the course of history, and (5) the administration and management of communal land for collective usage and for the disadvantaged people among the Tais. On strategy to support and use research work (1) priority should be given to research programs on tai political systems which enable researchers to interact and communicate in networks through email, conference, journal etc. (2) get more organized in their conceptual and methodological approaches and their analytical skills especially Thai and local Tai scholars so that they can publish their work internationally, (3) significant findings about the Tai political systems should be disseminated to relevant Thai governmental offices (e.g. Ministry of Interior and Ministry of Foreign Affairs) for possible application of usage.