Li Heping's main research fields are philosophy of science and methodology of economics. The courses taught mainly include: advanced mathematics, natural science foundation, accounting, economic law, western economics, dialectics of nature, philosophy of science and technology, professional foreign languages and other courses. His research features interdisciplinary research. The published papers cover three fields: popular science, economics and philosophy. His doctoral thesis is entitled: Friedman's argument and its controversial research. The research object is Friedman's main viewpoint on hypothetical reality and the debate it caused for half a century. The time dimension of research: it can be pushed forward to Adam Smith and back to 2003; The discipline dimension of the research: not only involves Samuelson, koopman, Simon and other famous economists. , but also famous philosophers such as Popper, lakatos, Kuhn, Neger, etc. Spatial span of research: including famous scholars from the United States, Britain, Canada, Finland and other countries.