The study of imperial civil examination touches upon history. Educational science, political science, literature, sociology, etc, and can not be covered by any one discipline. A brief introduction to the works on the study of imperial civil examination system published in Japan, Republic of korea and America indicates that it has become an international branch of learning. The relationship between the study of imperial civil examination system and its theory is to have six classics as annotations and to have six classics annotated. The study of imperial civil examination system is not a simple accumulation of the existent literatures on this branch of learning, but the establishment of this study as a discipline in its own right, taking it as a "science ", exploring its maximum academic value and its realistic significance.