Roman law is the foundation of the legal system in many countries today. The so-called "civil law" originated from Roman law. In the countries of continental law system in Europe and many countries in South America, due to the existence of the French Civil Code, there is a close relationship with Roman law. In countries and regions where common law system is practiced, the influence of Roman law is relatively small. The origin of Roman law is the famous twelve tables method (449 BC). After that, Roman law developed greatly, and after several centuries, it formed the cornerstone of laws in many countries today. For example, Roman law puts forward the difference between contract and tort. Prior to this (such as ancient Greek law), the non-performance of the contract was simply regarded as a tort. In addition, Roman law also puts forward the difference between possession (a factual state: someone owns an object) and ownership (a right: someone can do anything with an object). In addition, the concept of modern contract comes from the consensual provisions in Roman law, that is, Roman law is divided into "civil law" applicable to nationals and "civil law" applicable to foreigners, which is the origin of current private international law. During the period of 1500, Roman law rose twice in the Middle Ages and Renaissance, which directly became the origin of modern bourgeois law and the pioneer of modern law. I think Roman law provides the foundation of legal system for many countries, and the legal concept of equality and fairness is of eternal value beyond time and space.