Abstract
As two important fields of the human academic activities, the humanities and social science are both different and inherently unified. The differences between the humanities and social science mainly include the following three aspects: first, the objectives of the humanities and social science are different. Second, the thinking orientations of humanities and social science are different. Third, humanities and social science are thinking in different ways. For the unity of the humanities and social science, we can understand it from the following three aspects: first of all, humanities and social science are internally correlated in the research object. Secondly, humanities and social science restrict and guide each other in the process and results of exploration. Furthermore, humanities and social science dialectically complement each other in the spiritual ethos.