1. Introduced the Enlightenment into Russia, integrated the Enlightenment into her rule, and created a set of successful foreign policies.

2. During the period of Catherine II, the Russian Empire expanded to the south and west, seized a large territory from the Ottoman Turkish Empire and the Polish-Lithuanian Federation, divided Poland three times, fought with Turkey to acquire the coastal areas of the Black Sea, and annexed the Crimean Khanate. The imperial territory spans Europe, Asia and North America, extending to the north of the Arctic Ocean, the south of the Black Sea, the east of Alaska Pacific Ocean and the west of the Baltic Sea.

3. Internal system reform. 1767, the establishment of the legislative assembly, system reform. 1775 introduced the local government self-control system, 1785 promulgated the imperial edict on granting aristocratic privileges.

In a word, during the reign of Catherine II, Russia became the most powerful country in Europe at that time and often intervened in European affairs.