Constructing international discourse system with Chinese characteristics is of great strategic significance and value under new condition, which is the objective request of adapting to peace, development, cooperation, co-winning trend of the times, and establishing a just and reasonable new international political and economic order. It is also the earnest demands of maintaining China's core national interests and striving for the most favorable external conditions to realize China's Dream. It shows the inevitable requirement of manifesting China's open and confident diplomatic style and responsible big country's image and improving national soft power. It also indicates the inner requirement of handling the issue of fighting for international discourse right and adhere to Marxism ideological discourse. Xi Jinping's strategies concerning the construction of international discourse system contain a series of new ideas, new assertion, new thinking and new viewpoints, as follows: affiliating China's Dream with the dreams of people all around the world; realizing China's Dream by doing solid work; supporting economic and trade cooperation and talents' communication-oriented community with common destiny; sticking to the road of peaceful development with maintaining the legitimate rights and interests; no sacrificing China's core national interests; exploring diplomatic path with Chinese characteristics, emphasizing the top-level design, and so on. Therefore, based on the inspiration of Xi Jinping's important speech, it is of great importance to innovate positively and construct international discourse system with Chinese characteristics. In addition, it is necessary to expand the new situation of external publicity and presentation of national new image.