近年來，不論是在我國或德國，常見有因反對各類交通、能源等基礎建設計畫所展開之大規模抗爭行動。為探究問題根源，並尋求長久解決之道，德國法學界及立法實務界立即意識到是否現行計畫行政法制中，關於公眾參與之相關規定有所缺漏，並積極透過修法嘗試再行改善及強化該等機制。也因此，本文首先分析德國及我國現行各類計畫程序法制中公眾參與之相關規定，以探尋其缺失之處。繼之，並說明公眾參與之概念，及透由在計畫行政程序中嵌入公眾參與欲謀求之目的，與其應有之功能。再者，若欲改善並強化現行計畫行政程序中之公眾參與機制，則應思考在法制化時應將何等核心要素納入規範，方能使其確實有效達成前述目的，或發揮應有之功能，此亦為本文說明之重點。又由於我國行政法制向來深受德國法制之影響，因此本文最後亦將簡要說明該國聯邦行政程序法於2013年中新增第25條第3項關於及早公眾參與之規範內容，以及該國學理上對該條項規定之評析，以期能作為我國日後修法之參考。

In the recent years, the large-scale actions which protested against all kinds of infrastructure plans for transportation or energy occurred commonly in Taiwan as well as in Germany. The research will explore the root of the problem to seek the long-term solutions. The jurisprudence and legislative practice immediately explore whether the current administrative law for the relevant provisions of the public participation is lacked or inadequate. Then, these mechanisms are energetically improved and strengthen by modifying the laws. As a result, this study analyzes all kinds of planning procedures for the relevant provisions of the public participation and to explore its deficiency. The research explains the concept of the public participation to reach the purpose. Besides, it is advanced the function through adding public participation in the administrative procedures. Also, this study investigates what core elements should be included in specification to improve and to strengthen the public participation mechanism of the existing administrative procedures. The legislating and modified law in our country is deeply influenced by the German legal system. Finally, the study briefly explains the content of the public participation norm from the last § 25 III of the German Federal Administrative Procedure Act in 2013. The study provides the valuable reference for the future research.