The two inevitable trends are bound to lead to a new history of the subject, that is, after the victory of the proletarian revolution, where is the future of the socialist road to? First of all, that is necessary to find out "what socialism is and how to build socialism." This paper comprehensively surveys Marx and Engels envisaged the future of society as well as the history of the relevant historical facts of the international communist movement, the history of the use of combined methods, backward countries of the East after the proletariat to seize power, how to build, how to consolidate and develop the socialist course of this difficult exploration of the theory to describe and explore the phenomenon.