Necessity: First, the complexity of education. Primary education is a huge cornerstone in the education system, which is needed by the development of society and people. In order to scientifically and systematically train natural persons from generation to generation into socialized and personalized people and give them the ability and opportunity of lifelong education, it is necessary to use various scientific theories and methods related to people and society to conduct comprehensive research. Secondly, modern primary education is facing a new issue of the times. The primary education in contemporary China is the education in the era of popularizing nine-year compulsory education, the education in the information age and the beginning of the formation of lifelong education system. These new topics of the times will affect the knowledge and methods of many disciplines. Third, the scientific system of modern primary education needs to be broken through and improved, open to multi-disciplines other than pedagogy, and carry out interdisciplinary grafting research.