Whether creating pawn system in our civil iaw is controversial----Scholars who are a-gainst it have an idea that repurchase covenant contract amd real property pledge can be alternatives.

It is necessary to introduce contract system to construction enterprises operation and management,so as to adapt to the further development of the market economy,raise the level of business management,increase enterprise benefit and construct socialism harmonious society.

It is a necessity of historical development, building a harmonious society and enterprise development to establish a contract system for private enterprises.

The traditional researches on deposits usually take the deposit contract as given,and there are few analysis about the features of deposit contract,the microstructure of deposit product,and the design mechanism.