Legalist school, one of the pre-Qin hundred schools of thought, is an important school in China's history that advocates taking the legal system as the core idea and making the country rich as its own responsibility. The history of Chinese art is listed as one of the "nine streams". Its ideological source can be traced back to Li Guan in Xia and Shang Dynasties, and it was also called the study of criminal names in the Spring and Autumn Period and the Warring States Period. After the vigorous development of Guan Zhong, Shi Zhai, Zi Chan, Wu Qi, Shang Yang, Shen Dao, Shen Buhai, and Drama Xin, it became a school of its own. At the end of the Warring States period, Han Fei summarized and synthesized their theories, which were masterpieces of Legalists. Its scope involves social sciences such as law, economy, administration, organization and management, social reform, law, economy, finance, currency, international trade, administration, organizational theory and operational research. Their idea of governing the country according to law is still far-reaching, which shows that they attach great importance to the legal system and regard the law as a compulsory tool conducive to social rule. These thoughts, which embody the construction of the legal system, have been used to this day and become the main ruling means for centralized people to stabilize social unrest. The birth of contemporary China law is influenced by legalist thought, which has a strong constraint on a country's politics, culture and morality and has a far-reaching impact on modern legal system.