Market maker system is a necessary transaction system to enhance OTC liveness and mobility. It is aimed at the demand of the pressing mobility and the conflict between market maker system and the obstract in the law and system.We are using the thinking of commercial law to protect businessmen and the rentability of commercial behavior,also we emphasize that during the construction of OTC market and to be the market maker,it needs to set up a strictly qualification in the aspect of capital,reptation as well as business operation,also it should conclude clearly the right and obligations of the interest on difference in price,make market exempt,and information disclosure,by the way,it needs to strenghthen the administrative responsibility to realize the strict supervision,and through the eastabliment of the mechanism of short sales,issuing coupons relief system to guarantee the working for the market maker system. <<