Abstract：The system of“Junshu and Pingzhun”, proposed by Sang Hongyang, is a great attempt on the largest scale based on the principle of “heavy v. s. light”after China established a unified regime. At The Salt and Iron Meeting, Sang Hongyang expounded the rationality of the system based on its characteristics and advantages, while Xian Liang and Wen Xue objected to the system considering the serious official corruption. Therefore, the system of “Junshu and Pingzhun”was gradually abolished after the meeting. The system of “Changpingcang”, proposed by Geng Shouchang in the period of Han governed by emperor Xuan and emperor Yuan, is an inheritance of the system of “Junshu and Pingzhun”on a smaller scale. The system of “Wu Jun She Dai”, proposed by Wang Mang, completely failed because of the official corruption.

Keyword：The Salt and Iron Meeting;heavy v.s. light;the system of “Junshu and Pingzhun”;the system of “Changpingcang”;the system of “Wu Jun She Dai”;