The establishment of the People's Republic of China has had a significant impact on the development of Chinese fine arts. This impact also undoubtedly affected Fu Baoshi, the painter. After an initial period of adaptation, Fu Baoshi step by step completed the change in his creation of painting. He increasingly consolidated his social and political status, gradually moving from the initial marginalized state toward the core of artistic creation in Jiangsu Province. At the same time, his thoughts and ideas were also constantly changing, from uncomprehending to accepting, identifying, eulogizing, catering, and converging. From a free painter outside politics, he became a creator within the system and even a yes-man and advocate in regard to a variety of practical politics, from attaching himself to politics to attaching himself to policies. This series of rapid changes made it increasingly difficult for him to create independently. This essay aims at explaining the changes in Fu Baoshi's journey within, during his later years from the perspective of socio-political and personal psychology and analyze his turn human nature and character; in order to present vividly the various features in his mental activities behind art creation during his later years.