This paper addresses some essential issues of electricity market building， i.e.， the commercial property of electricity， the relationship between electricity market reform and electricity market building， the objective and function of electricity market， and the roadmap of electricity market building in China. It points out that the electricity has the commercial and public goods properties， and any arrangement should be made based on these two properties. To realize the commercial property of electricity， electricity market reform is the exclusive choice. In this market， the competition between the different generating units is propelled by the choice of customers. Therefore， the ice-broken action of the Chinese electricity market reform is to establish the policies to form the price of the electricity transmission and distribution， as well as the gradual openness of end users.