Abstract: The trend of Rome Law relating to rights over things embodies many factors of modern property right system.Our definition of modern property right is that,based on the capital from the investors,it is the right synthesis of the owning exploitation,earning disopsing of tangible property and intangible property forming in the business operation possessed by the business and additional rights derived from the protection of the state compulsory force which is for the purpose of increasing the value of the business assets.The subject of property right can be only Business Corporation;its object includes not only assets but also liabilities.

Key words: Roman Law, property law, property rights, assets, additional rights