In the category of supranational law, EU law is a typical representative. What we call ＂the birth of the European Union law＂ is that it takes the core point of view of Marxist legal thought named ＂economy deter- mines law＂ as theoretical basis. The European Union, as a kind of organization of European countries, its ra- tionality and legitimacy of its existence are based on the contract. EU law is based on the treaty of EU member states. However, the EU＇ s good development lies in rules of synergy and convergence, and the interoperability of rules is a very important approach to the development of European Union law.
development and change