This article revolves around Lao Sze-kwang's interpretative approach to debates between Confucianism and Buddhism in Neo-Confucianism, beginning with Lao's discussion about the debates between Confucianism and Buddhism throughout the development of Neo-Confucianism and reflecting on whether Lao's own analyses about Confucianism and Buddhism informed his interpretation of Neo-Confucianism and even Chinese philosophy. Here we focus on Lao's statements about Neo-Confucianism in the third volume of his The History of Chinese Philosophy, clear up the contents about various Neo-Confucians' debates about Confucianism and Buddhism, and establish that the theme of Neo-Confucians' debates about Confucianism and Buddhism is presented in context of "the attitudes toward the world." And then we will inquire profoundly the method consciousness of Lao's statements about these debates between Confucianism and Buddhism and establish "affirming the world" as his fundamental attitude and the "theory of mind-nature" as the heart of his philosophical criteria. Finally, his interpretative approach to Chinese philosophy will be reviewed in the afore-mentioned contexts.