The North South Grand canal in the Qing and Ming eras was an artificial waterway served as a political and economical hub for Beijing and Jiang Nan region, which also generated the foundation of several new towns and cities along the banks including Tong zhou. Tongzhou is situated at the most northern part of the Grand canal, twenty five kilometres from the Capital Beijing, possessing great geographical advantage. The palace had constructed a great granary as it is a classic example of a canal city, the prosperity of the city depends on the traffic of the grains. The focus of this thesis is on the discussion of how the politics, military, economy and other elements are influenced on the implementation of the Grain Tribute System. This research shows Tongzhou was greatly affected by the Grain Tribute System and whilst being so close to the capital, the fate of this city was tightly gripped by the power of the state. However, after an analysis of its military stratigic position, economic development and various other aspects, we can see Tongzhou in a different historical representation.