Abstract: An effective supervision mechanism is the foundation for the development of democratic politics，the role of which is to find the existing problems in reality，and to urge the problems to get solved，so as to achieve the goal of social fairness and justice. Focusing on how to supervise government power，this paper analyzes the supervision system in China，in which supervision by the People’s Congress and media supervision，the two most important forms of supervision，play an important role of supervision at different levels. Then the authors discuss their advantages and the problems faced，and analyse the realistic foundation and benefits to combine the two and form resultant force of supervision. We hope to provide reference for enhancing the effectiveness of supervision.

Key words: supervision by the People’s Congress, media supervision, democratic politics, social fairness, power