After Zhao Kuangyin proclaimed himself emperor, he successively conquered the separatist regimes of Houshu, Nanhan and Nantang.
During Zhao Kuangyin's reign, he learned the lesson that the eunuch's autocracy and separatist regime in Tang Dynasty led to his demise, and cut off the power of the military attache, so as to emphasize literature over martial arts and strengthen centralization, so that the problem of eunuch's autocracy and separatist regime did not exist in Song Dynasty. Song Taizu vigorously promoted Confucianism and increased the number of imperial examinations. Compared with other dynasties, the society in Song Dynasty was more stable and fair, and literature, philosophy, art, science and technology and education were more developed. However, the result of emphasizing literature over martial arts also led to the lack of military strength in the Song Dynasty, and most foreign wars ended in failure.
In the ninth year of Kaibao (976), Zhao Kuangyin was on the way to the northern expedition to Qidan, drinking with his brother Zhao Guangyi and staying in the palace. The next morning, 49-year-old Zhao Kuangyin died suddenly. In July the following year, he was buried in Yongchang Mausoleum.