本文研究目標有二：第一，印證十二紀之「理」可作為《呂氏春秋》黃老思想之檢證脈絡。第二，體現「理」概念統貫《呂氏春秋》不同思想來源的媒介功能與黃老道家兼容各家思想所長的特質。本文分從四個層面闡述：首先，整理過去學者所提出之「理」概念與道家、或黃老道家相關者；其次，歸納十二紀所有含攝「理」概念的文句，釐清其「理」概念的意涵要點，是否與黃老道家有所承襲；再次，通過《黃帝四經》、《管子》六篇1之「理」的對照，檢視十二紀之「理」與黃老道家核心概念的連結。最後，再從四時、陰陽、五行的演變脈絡，釐清十二紀之「理」所具有的獨特性。透過本文探討，期能對《呂氏春秋》有更深入的認識，並呈現「理」概念的思維提供我們理解《呂氏春秋》的另一種視野。

There are two objectives in this study. First: prove that the concept “Li” in Twelve Almanacs can be the context of justification for the Huanglao Thoughts in “Master Lü’s Spring and Autumn Annals”. Second: embody the concept “Li” to unify medium functions in different origins of ideology and thoughts stated in “Master Lü’s Spring and Autumn Annals” and show the characteristics of Huanglao which combines other thoughts and ideas. The Study is divided into four parts: First, arrange the concept of “Li” proposed by scholars and people believing in Taoism or Huanglao. Second, clarify the principal meaning of concept “Li” by summarizing all sentences in Twelve Almanacs regarding the concept “Li” and see if it’s the same as that of Huanglao. Third, compare “Li” in “Huangdi Sijing” and “Guanzi” to see the connection of “Li” in Twelve Almanacs and Huanglao. The last but not the least, from the evolution of Four Seasons, Yinyang and Wuxing, clarify the uniqueness of “Li” in Twelve Almanacs. Through the Study, we hope to know deeper the book “Master Lü’s Spring and Autumn Annals” and also to show the ideology of concept “Li” that makes us understand the Book from another perspective.