The paper investigates the history of numerus clausus overall,and then points out that the category of the real right must be stipulated by law,and not be established freely by the interes.

The present article aims to analyze the connotation,representative development history,rationality and limitations of numerus clausus,pointing out that numerus clausus is the foundation for the existence of property law and should be abided by.

The author suggest that we should abandon real right legal doctrine principle under establishing the science and appropriate princip.

Legalism and Fiscal Policy for Promoting Employment;

Conceptual Conflict between Trust Law and the Numerus Clausus Principle and the Conception of Resolution;

Though numerus clausus is the basic principle in the traditional property law,viewed from sys- tematism,its contents are very uncertain,and it can t correspond with the change the publication of real right as well as the opening of the civil law system.

As a basic principle of property right,many theoretic and practical shortcomings of numerus clausus appear,which are difficult to be eliminated and become a hinderance of the development of property right and society.

The doctrine of numerus is the most important doctrine of the traditional rights over things, it mainly means the kind and content of the real right are stipulated directly by the law.

The doctrine of numerus is the most important doctrine of the traditional rights over things, including “category imposed” and “content fixed ”.