Generally speaking, the ancient supervisory system in China was still under the feudal system, aiming at maintaining the rule of the monarch, and it was a tool of the feudal regime. The modern supervision system in the west is to limit the monarchy and safeguard the interests of the bourgeoisie. It has the embryonic form of modern democratic system and has democratic significance. In addition, China's ancient supervisory system was constantly strengthened, reaching its peak in the Yongzheng period of the Qing Dynasty, which curbed the germination and development of capitalism in China, while the west was the opposite. Similarities: they are all specific products under the background of a certain era, and they are all aimed at safeguarding the interests of the ruling class.