Abstract: In order to pursue their stability and continuity,all the power-holders were looking for a political system that could unite the legitimacy and the efficacy.Hongxian Imperialism was the political choice of Yuan Shikai to automatically get the efficacy of modern society by the traditional legitimacy of imperialism authority,and to pursue the stability and the continuity of the regime.In order to obtain the only centralized power,he took use of the democratic procedure to make up the continuity from the republic to the imperialism,which was the modern way to break away from dilemma of efficacy crisis.

Key words: central authority, efficacy, democratic procedure, Yuan Shikai