When Qin Shihuang was in power, he annexed six countries and sent troops to explore the north and south. In history, it is said that "all the places that are over a hundred miles bow down", "thousands of miles go north" and "the king of Qin sweeps six rivers". According to the map of the Warring States Period, the territory is almost twice the area controlled by the Seven Heroes of the Warring States Period. Moreover, Qin Shihuang "set up a county" and paid attention to the rule and system construction of conquered land, unlike other contemporary conquerors such as Alexander of Macedonia or Rome, which only paid attention to conquest but not to system construction; Thus stabilized the unified land rule and laid the foundation for the present Chinese territory. Later generations thought that "his contribution was greater than Qin Huang's Hanwu". Qin Shihuang is ahead of Han Wudi in martial arts, which is unparalleled in history.

Since Shang Yang's political reform, Qin attached great importance to the rule of law. Qin Shihuang inherited this tradition and admired Han Fei, a legalist figure. He once lamented that "if you walk with him, you will have no hatred." Reward and punish generals according to law. Although Qin Shihuang was autocratic and thought that "we rule the world", he still ruled the country according to law in the Qin Dynasty. Chen Sheng and the uprising, the reason is that "Qin law is harsh", and its crime is capital crime, so it has to be reversed, but the law forces the people to rebel. Nor is it like the "Zhumen wine stinks and frozen bones" in later generations. Because of serious corruption, officials forced the people to rebel. Later Confucianism advocated the rule of man, but not by law. A word was decided by the monarch, but the wind of rule by man and flattery still exists today.

Qin Shihuang initiated the post station system and built post roads. It laid a technical foundation for the decree access of the huge empire and the resulting county-based imperial power country. "Building a post road and establishing a county" is a necessary condition for China to adopt the advanced county system to replace the western enfeoffment system. At the same time, Rome can't effectively control the occupied areas, and there is only one powerful governor (the governor is in charge of the military and political power of a place, all of whom are nobles, and the grass-roots organizations rely on the original local organizations), which is still similar to the enfeoffment system, which is a very important reason for the later division of the Roman Empire. The county system is a civilian system, and its military and political leaders are appointed by the emperor. According to their political achievements, their military achievements can be raised or lowered and leveled, which leads to the emergence of professional bureaucrats and professional soldiers. Professional bureaucrats and professional soldiers can come from civilians, and county bureaucrats effectively protect the rights of civilians (Brazzaville) to participate in and discuss state affairs (such as Reese and Meng Ao). They are all cloth, and they can only come out after military achievements). Compared with the feudal aristocratic politics, it is undoubtedly a great historical progress. This is the origin of the civil service system and the military system in modern countries.

The Qin Empire established by Qin Shihuang laid the foundation that China's political system was more advanced than that of the West in recent 1700 years. The so-called "Han inherited the Qin system", "its system was unchanged from Qin" and "Qin politics and law were practiced in previous dynasties". China, in the era of imperial power in 2000, basically followed the system of Qin Dynasty in political system.

Li Bai's "Antique" poem: "Qin Wang sweeps Liuhe, he looks!" Sang Hongyang affirmed Qin Shihuang's achievement in unifying China in his works. Modern Zhang Taiyan also praised Qin Shihuang in Qin Zheng Ji 19 13.