Nash equilibrium theory has laid the fundamental foundation of modern mainstream game theory and economic theory. As Kreps (199) said in the introduction of Game Theory and Economic Modeling, "In the past twenty years, economics has experienced a moderate revolution in methodology, language and concepts, and non-cooperative game theory has become the center of the paradigm ... in economics or finance and accounting related to economic principles. The important influence of Nash equilibrium can be summarized as the following six aspects < P > 1. It has changed the system and structure of economics. The concept, content, model and analytical tools of non-cooperative game theory have penetrated into most disciplines of microeconomics, macroeconomics, labor economics, international economics, environmental economics and other economic disciplines, changing the content and structure of these disciplines, becoming the basic research paradigm and theoretical analysis tools of these disciplines, thus changing the connotation of each branch of the original economic theoretical system.

2. It has expanded the scope of economics to study economic problems. The original economics lacks effective methods to model uncertain factors, changing environmental factors and the interaction between economic individuals, so it can't dissect and analyze micro-level economic problems. Nash equilibrium and related model analysis methods, including extended game method, backward induction method, sub-game perfect Nash equilibrium and other conceptual methods, provide economists with in-depth analysis tools.

3. Strengthened the depth of economic research. Nash equilibrium theory does not shy away from the direct interaction between economic individuals, and is not satisfied with the simplification of complex economic relations between economic individuals. When analyzing problems, it not only stays at the macro level, but also deeply analyzes the deep-seated reasons and laws behind appearances, emphasizing the discovery of the root causes of problems from the perspective of micro-individual behavior laws, so we can understand and explain economic problems more deeply and accurately.

4. A research paradigm system based on classical game is formed. That is to say, we can classify various problems or economic relations according to the types or characteristics of classical games, and study them according to the corresponding analytical methods and models of classical games, so as to transplant the experience gained in one field to another conveniently.

5. The relationship between economics and other social sciences and natural sciences has been expanded and strengthened. Nash equilibrium is great because it is ordinary, and it is almost ubiquitous. Nash equilibrium theory is not only applicable to the law of human behavior, but also to the law of the survival, movement and development of other creatures other than human beings. The bridge function of Nash equilibrium and game theory makes economics more closely linked with other social sciences and natural sciences, forming a virtuous circle of mutual promotion between economics and other disciplines.

6. Changed the language and expression of economics. Kandori (1997), who is quite accomplished in evolutionary game theory, once made a humorous extension to Paul Samuelson's famous saying, "You can even make a parrot become a trained economist, because it has to learn only two words, that is,' supply' and' demand'." He said, "Now this parrot needs to learn two more words.