Abstract: After the outbreak of Wuchang Revolt, provinces of South China declared their independence one after another. This made China split into North and South. At this critical time, the revolutionaries with SUN Zhong-shan as a representative stuck to the principle of the whole world as one community and the thought of fraternity, and made great concession and compromise. Finally, under great effort of statesmen with great wisdom of both South and North China, emperor of Qing Dynasty declared to give up the throne and the nation was unified peacefully. For the peaceful unification, the actual strength was the foundation, the wisdom of statesmen was the premise, and the tenet “the whole world as one community” and fraternal thought were the important condition