In the past thousand years，Bo Yi and Shu Qi as the symbol of high moral principles，had a great influence not only in China but also in Korea. Since the late Goryeo Dynasty Korean the loyal officials and the righteous man usually followed Bo Yi and Shu Qi. To the later Korea Dynasty，Korea praised Bo Yi and Shu Qi highly as the whole society paid more attention to the spirit of Chinese people. Yi Qi theory reflected the political and ideological changes in later Korea.