After the lifting of martial law, the civil-military relation in Taiwan has undergone a lot of change. This dissertation argues that, accompanying with the progress of democratization, the civil-military relation in Taiwan has moved to a status of maturity and stability gradually. By examing the course of “nationalization of the military” in Taiwan’s experience of democratization, the author finds out that the “party-army” system contributes to nationalization of the military. Army plays the role of facilitation rather than obstruction in Taiwan’s democratization. In addition, the author discovers that Taiwan has reached the status of democratic consolidation in terms of carrying out the notion of civilian supremacy. After two times of turnover of ruling party, Taiwan has realized three basic conditions of civilian supremacy by the implementation of the two laws of national defense. The three basic conditions are political neutrality, democratic contral and social impartiality.