Abstract: In the Qianlong reign, the construction of Qiantang river seawall project marked the transition from “repair by people ”to “repair by government”. In order to realize this objective “once and for all,” the Qing government did not spare any expense to construct the fish-scale stone seawall. By the late Qianlong reign, the seawall project system was basically complete. In Chinese history, water-control was always one of the basic functions of the governments. The amount of funds involved in water control often reflected the degree of the government??s effectiveness and enthusiasm. The amount of funds and the government’s role in a local project, along with an overall research, reveal effectiveness of the Qing government in the eighteenth century.