In contemporary media environment, traditional news media and social media co-exists. The traditional news media like newspaper and television, take official news and civic news as main content, is experiencing a power transmutation. The transmutation includes the power limitation and realization in the public opinion supervision, and also the power game between supervision subjects and supervision objects. The analysis path from subjects to objects and effects will help us to observe the multiple power transmutation of public opinion supervision. Based on the observation, we will find the way of realizing supervision efficiency, balancing supervision power and regulating supervision behavior. Then we can build a rational pattern for the separation of media supervision power.