Herbart solved the problem of teaching methods with his psychological theory "interest". Interest is of great significance to education and teaching. First of all, it is the intermediate goal of education and teaching. Only a variety of interests can give the will the necessary inner freedom, and students can control their actions with correct views. Secondly, interest is an important means of education and teaching. Only continuous interest can make people open their minds easily, get in touch with the world and sincerely share their destiny with their compatriots. Interest is the key to the smooth progress of education and teaching. In this way, Herbart established education and teaching on the basis of psychological theory, which made it have certain scientific value.