In this thesis, comparative experienced similar historical events the countries in East Asia, Korea and Taiwan. Research focus is democratic development and media’s role in Korea and Taiwan. This research theme is composition of communication studies and political science. Firstly, I reviewed basic concept of media and democracy’s correlation, and media’s role in democratic countries, Secondly, purchased Korea and Taiwan’s democratization process on view of comparative political science. And I followed media’s role on democratization process. Research’s basic point of view is comparative study, and also used literature analysis method. The purpose of this study is review Korea and Taiwan’s journey of democratization, and through the past experience what was the role of the media.