Electric power is a milestone in human civilization because it pushes forward the industrial and infor mation process of our society, and the application of electric pow er in our daily life is being perfected because of the development of science and technology. In the filed of power el ectronic technology, power electronic system integr ation is always the hot issue. This essay introduces the concept, c ontent, level and format of power electronic system integration and digs into the content and research direction of pow er electronic system integration technology.