Abstract：Compared with that in Tung Meng Hui period, Sun Zhong shan's political system idea in his late years has advanced rapidly. His political system idea transformed from the warm pursuit of Americanized democratic republic to the respect of Bismarck's enlightened autocracy, from insiting in advancing rapidly to the advocation of advancing gradually. All the transformation of his political system idea in his late years was resulted from the conclusion of his revolutionary experience and the comparation of the political system and national conditions between the West and China, which was very rare and also showed his great personality.
