The relation between Kuhn and logical empiricism was revalued recently, somebody represented Kuhn was a conservative rather than a revolutionist How should we evaluate the philosophy contributions of Kuhn? The authors believe the great contribution Kuhn achieved was he switched the research approach in the philosophy of science First the authors take scientific knowledge as the outcome of representation, then they focus on the actual scientific practice itself The other science studiers, including the constructivists of scientific knowledge and the cognitive scientists, realize the great achievement Kuhn had than he considered. Maybe it is the cause why Kuhn looks like a conservative