Educational psychology is an interdisciplinary subject between psychology and pedagogy. It is not the application of general psychological principles in education. The core of its research is students' learning rules and teaching rules based on learning rules. Therefore, it has its own unique research object. For example, the nature of learning, the process and conditions of learning, the motivation of learning, the monitoring of learning, the mastery of knowledge, the formation of skills and the formation of morality are all basic theories in educational psychology.