有關於層次分析(levels-of-analysis)的研究早於第二次世界大戰以來即受到西方學者相當之注重，但國內相關之研究仍未重視層次分析之研究途徑，亦很少有研究著作涉及層次分析之研究架構。近年來隨著「建構主義」 在國際關係理論上愈受重視，開展相互主觀、研究「結構/體系」與「單元 /能動者」之動態互動關係，並提及跨層分析的重要性，可惜建構主義學者亦未能將層次分析之相關理論做系統性之整理或推導成分析模型。針對此，本文將傳統國際關係理論及建構主義涉及層次分析的研究途徑歸納為五大類，並提出相關層次分析之分析架構(analytical framework)及相關模型，以進一步推動國際關係研究中對於層次分析之重視，並冀有裨於國際關係研究者對複雜的層次分析能有一個較有系統性之分析架構。

Levels-of-analysis has been one of most important IR theory in the West since World War II, but still waiting to be explored in Taiwan. With the rises of constructivism emphasizing the concept of intersubjectivity, exploring the relations between structure and agency, and reverting the significance of cross-levels analysis, researchers are forced to recall levels-of-analysis approach. However, there is still a pity that constructivism did not offer a modeling analytical framework for the studies of levels-of-analysis. Therefore, this essay tries to distinguish IR Theory by constructing levels-of- analysis into five categories and offers a modeling explanatory framework for the studies of levels-of-analysis.