Abstract: In the later period of the 18th century，corruption，the chronic malady of the highly centralized bureaucracy system， became more serious than ever and displayed many characteristics which were seldom found in the later period of other dynasties.This paper intends to make a comprehensive study on the corruption in various fields such as politics,economy,finance and culture.It also tries to find the reason why the Qing dynasty changed from prosperity to decline，and to show how China advanced with a limp from a traditional to a modern society。