由於先天即存在應然與實然的落差，加上後天多元研究取向所導致立論之分歧，使得半總統制常有評價之爭議。因此，論者在研究中除了應正確認識半總統制的理論內涵，亦需謹慎進行案例的比較或應用，始能產生更精確、細緻的研究成果。本文出於這樣的關懷，將從理論層面出發，透過相關文獻檢閱與不同研究方法之回顧，重新發現半總統制的分析焦點及不同運作類型之內涵及變遷方向。再者，本文也將進行半總統制案例的初步檢驗，以確認半總統制國家實際運作的不同樣態與其中原因。

Since Maurice Duverger proposed the concept of semi-presidentialism in 1980, disputes have increasingly been raised among researchers. Given the gap between norms and operations of semi-presidentialism, as well as the complexities among the relationships of president, prime minister, and congress in the operations of semi-presidential countries, this paper develops a theory-driven comparative framework of this concept. Through re- examining the definitions of semi-presidentialism and the methodology of analyzing its operational types, this paper also discovers the intention and trend among them and explores the independent variables of semi- presidentialism operations to explain the operational types and their transitions. By classifying semi-presidential countries according to their patterns of operational types, this paper not only provides researchers with a more effective model to explain or predict semi-presidentialism operations in different countries, but also assists in solving constitutional problems more effectively.