半總統制乃廣泛使用卻飽受爭議的一項概念。能否將半總統制視為一種獨立 的政體類型，便影響到民主政體的分類方式—亦即究竟採取「三分法」或「二 分法」的觀點。為了避免錯誤分類的問題，本文試圖從Elgie 所提出的「配置」 與「相關」兩項特性出發，用以檢視半總統制的定義及政體的類型學，其結果發 現，我們應當將焦點置於「行政權」（非「仲裁權」）的歸屬部分。依據憲法規定， 我國憲政體制依舊具備濃厚的議會制色彩，但因「國安大政方針決定權」尚有爭 議存在，故而保有議會制與半總統制的詮釋空間。

Semi-presidentialism is a highly used but commonly confused concept. Whether semi-presidential system can be deemed as an independent type that will influence the classification of democratic regimes: ‘trichotomy’ or ‘dichotomy’. This article attempted to begin with Elgie’s two properties (dispositional and relational) for examining semipresidential definitions and typologies of regime type, in order to avoid the problem of misclassification. The finding suggests that we should focus our attention on the ownership of ‘executive powers’ (not ‘arbitral powers’). According to the Constitution, Taiwan’s regime still keeps the spirit of parliamentarism, but there are some disputes of ‘the power of policy courses for national security’, thus it has parliamentary and semipresidential explanatory spaces.