The early 20th century was a time of rapid change in Confucianism. As East Asian intellectuals actively learned from the West in the process of modernization, Confucian classical education lost its dominant position. Western learning changed the education system in East Asia, and textbooks on self-cultivation replaced traditional Confucian literature such as the Four Books and Five Classics, the children’s textbooks and the family rules, and became the textbooks for the moral education curriculum in the new academic system. Although these textbooks are still referred to as books for self-cultivation, the knowledge has been reconstructed in the Western educational framework, and their contents are not limited to moral education. This article analyzes the transformation of Confucian knowledge in Korea under the influence of Western learning based on the theoretical explanations and the school textbooks in the Korean Enlightenment Textbook Series. It reveals that Korean intellectuals established a curriculum for moral, intellectual, and physical education, as well as a curriculum for health education, which brought the Chinese and Western cultures together from conflict to coexistence at the beginning of the twentieth century.