In summary of whole life of Fang Bao, he studied literature before Kang Xi thirty year. He changed to Zhu Zi's learning after Kang Xi thirty year. In Kang Xi fifty year, he studied Three Ceremony. This was a process of integrating literature, Ceremony thought and classics thought. From standing point of Fang Bao, what's the nature of changing process? Was it a choice of research topics, or a turnoff of his personal learning? In order to study the topics, we could discover from the situation of biography. Everybody explained the world and changed it with his unique interest, motive, desire, expectation, religion, and ideology in his whole life. Fang ]3ao devoted himself to classics, and descendant seldom discuss his classics learning but focus on his literature. Fang Bao's writings about managing society, from the dimension of author, learning object was practical knowledge and social position was a scholar. From the dimension of writing, outweighed function of literature, necessity of everyday life was the content of literature. From the dimension of reader, practical experiences replace aesthetic experience. Above of all, ontology of literature disappeared. Fang Bao chose Zhu Zi's learning. The choice was a turnoff from inner world of nature of man in time of later Ming dynasty's several scholars to the outer world of managing society. The key point was Ritual. From inner world of nature of human in time of later Ming dynasty to outer world of managing society, Fang Bao reconstructed reasonable society with Ritual. So we could say that the skeleton of Fang Bao's learning was deduced with reasonable logic. If we treated him as a scholar merely, it would not see the whole entity of Fang Bao's thought.