England capitalist revolution in the 17th century and France capitalist revolution in the 18th century established two different political systems respectively,constitutional monarchy under parliament system and democratic republicanism.

In another word, Brunei has adopted the form of British constitutional monarchy, but traditional system of dynasty has remained the fundamental of this system.

The United Kingdom is the first constitutional monarchy in the world.

The thought of constitutional monarchy in the late Qing Dynasty is an important component of political thoughts in Modern China.

Tang Cai Chang s constitutional monarchy thought of putting it into practice by an armed rebellion by organizing the masses are different from that of Kang Youwei and Liang Qichao,who put forward the peaceful reform thought depending on the emperor,it also different from Sun Zhongshan s thought of realizing democracy and republic by means of revolution.

Through social practice for many years, he had a deep understanding on the abuse of the absolute monarchy and the roots of china s poverty and backward condition Also through the study of western political system and legal culture, he put forward a series of political reform idea, such as setting up congress and carrying out reformative idea of constitutional monarchy.