According to the methodical implication so ‘new history of political thought’, we intend to conduct a historical analysis toward the constitutional discourses of the Free-China Semi-monthly that published from 1949 on the historical, methodological, theoretical and individual levels. Two propositions on the historical and theoretical levels were the starting point: 1. the historical : the constitutional discourse in the Free-China Semi-monthly was the starting point for the political discourses of the post War Taiwan. 2. the theoretical: the innate action orientations of political discourses created a co-existent and co-variant relationships between discourses and actions. I postulate the constitutional discourses contained the following issues; the issues of idea’ relevant to constitutionalism, the issues of institutions/policies’ relevant to the government (the constitutionality or unconstitutionality of governmental policies), and the issues of action’ relevant to political activities. Constitutional discourses contain multi-dimensional characters and meanings that constructed by historical, political, ideal and linguistic elements. This research is a deep survey toward the historical, political, linguistic, and ideological levels of constitutional discourses. On the other hand, we try to discuss the understandings, opinions and uses of political elites on the ideas of “political order”, “constitution” and “democracy”. The following questions constitute the core concerns of our research: 1. The historical: What was the unique importance of the constitutional discourses of the Free-China Semi-monthly in 1950s Taiwan? 2. The theoretical: What are political and constitutional discourse? How did they continue, change and disappear? 3. The methodological: Why should we analyze political discourses in the study of structural changes? What were the significances of the analysis of discourses for political analysis? 4. The individual: What were the political beliefs of the authors and editors of the Free-China Semi-monthly? What they said and wrote were authentic and practical for themselves and the readers? What were their discursive rules? How were they formed and obeyed?