As Mr. Chen Yinque said, the emergence of Neo-Confucianism in Song Dynasty was a great cause, because it not only continued the tradition of Confucianism since pre-Qin Dynasty, but also combined the classics of Buddhism and Taoism. The rise of Neo-Confucianism in Song Dynasty has its profound social roots, namely, the development of commodity economy in Song Dynasty. The commodity economy in Song Dynasty showed epoch-making development in two aspects of commodity production and commodity exchange, which inevitably influenced the change of people's ideas and values. Driven by the commercial economy's pursuit of utility and effectiveness, the trend of seeking profit gradually prevails, which requires people to choose between benefit and righteousness or balance between them. It is also this social trend of thought transformation, in the ideological and cultural fields throughout the Song Dynasty Confucianists throughout the "justice and profit discrimination." It seems to be a debate between different theories, but in fact it is a prominent manifestation of productivity determining production relations and economic foundation determining superstructure.