Issuing by Pricing on the Net and Offering by Market Price are two kinds of IPO methods. The former has ever been used in our securities market, and the latter is still used. Under these two IPO methods and in the condition of issuing by sanction, the features of the influence on the rate of initial profit are different. In order to serve as a reference in terms of which method being taken on issuing, the essay will briefly discuss the problem by analyzing the maximum benefit of each economic entity.