Exploring the communication of East Asian Culture, this study aims to compare the Chinese and Japanese Confucians' interpretations on the ”application of China's ancient morality to practical affairs through statecraft.” Zhu Shun-shui (1600-1682) was a Chinese Confucian who made a journey to Japan in the troubled times as the Qing Dynasty was replacing the Ming Dynasty. Fukuokahan and Kaibara Ekiken were two Japanese Confucians who advocated pragmatism as the philosophical basis. This study mainly discussed the similarities and dissimilarities between these Confucians' thoughts and views on ”application of China's ancient morality to practical affairs through statecraft” (to rule the world and govern the people). The focus is on the interpretation of Zhu Shun-shui's thinking system and the role that system played during the communication of East Asian Culture.