Under the connection of concept of "great unity", this paper summarized the development process of Chinese modern “peace” thoughts. First of all, Through the analysis of the discussion on "peace" among the modern Chinese Elites Since the 17th century, this paper found out “peace” sometimes has been a means or a process and ultimately became a final goal for the modern Chinese. Secondly, this paper also led out the modern Chinese’s viewpoint that “peace” was formed according to the order which based on morality, justice and harmony. Finally, this paper has presented the author's opinion that there was a traditional concept of "great unity" under the modern Chinese’s “peace” thoughts.