Everything has two sides, so does the ancient supervisory system in China. Then I summarized its characteristics from two aspects. Characteristics of enthusiasm: 1. Directly responsible to the central government, the system is independent and the efficiency is extremely high. Since the Western Han Dynasty, "supervision" has formed an independent organization, acting as the eyes and ears of the emperor and supervising the officials and the people. After the Sui and Tang Dynasties, this system was more perfect, and the system of three provinces and six departments more clearly guaranteed the powers and responsibilities of prosecutors and was responsible to the central authorities. The establishment of "Yushitai" is very effective in provincial inspection, evaluation and reporting. 2. Infiltrate into the assessment, serve by assessment, and be promoted by ability, which is relatively humanized. Due to the development and perfection of the imperial examination system, the appointment, promotion and dismissal of officials all reflect "benevolence" and "humanization". Compared with the feudal hereditary officials in ancient medieval Europe, the west is more inclined to natural selection and primitive, such as improper management of feudal knights or insufficient personal ability, which will naturally be killed, merged and replaced by other feudal lords. 3. The reward and punishment system is relatively strict and fair. This largely depends on the emperor's personal ability. If an excellent emperor is in charge of power, then the superiority of this strictness and fairness will be obvious.