本文目的乃是欲從大理院之民事判決例中，嘗試去探究大理院的民事法源，去了解大理院所建立的民事法規範的淵源到底是從何而來？其審判究竟根據什麼樣的法源？大理院對這些法源的態度為何？法源衝突時，規範的效力問題又該如何解決？根據本文考察，大理院之民事法源，在成文法方面，除了約法之外，主要依照《大清現行律》民事有效部分作為其審判依據，在運用層面上導入了歐陸法學概念用來解釋《大清現行律》，促使中西法律文化的融合。此外，前清其它有效法律與民國時期民事特別立法也都被大理院以之為法源。關於條約，大理院則認為其具有法源地位，得直接適用而不需再經由國內立法程序。至於大清民律草案，在民國初年並非有效的成文法律，大理院將其定性為「條理」而加以適用，但是在適用上的判語則相當岐異，為其弊端。同時，大理院時期已經能運用外國立法例與一般法律原則來加強判決理由與調整當事人利益的分配。當然，大理院處於新舊交融的時代，一些傳統義理道德的觀念仍在大理院判例中找得著其痕跡。而對於判例，大理院則是承認其法源性，具有法規範效力，並且對其相當重視，形成獨特的地位，兼具羅馬法系與普通法系的特徵。 / This study is try to find the source of civil law during early republican china(1912-1928), and to apprehend how these kinds of source of civil law be shaped by the judges on the civil adjudications of Dali Yuan(Supreme Court). Besides, the focus is also on what these sources of law are and how Dali Yuan resolve the issue while these sources conflict. First, the statutory sources of civil law include the provisional constitution, treaties, Ching Empire Current Penal Code, and some civil regulations. Ching Empire Current Penal Code is the most important legal basis on the trial. Dali Yuan uses European legal concepts to interpret Ching Empire Current Penal Code and this give Penal Code a new life. Besides, Dali Yuan considers the treaty could be directly applied and not need to be by the way of internal legislative process. In this period, Civil Code Draft is still not valid, so that Dali Yuan takes Draft as principle of law to be applied. Moreover, foreign statutes sometimes can be found in the judgment to strengthen the reason. Of course, on the era of variance, sometimes traditional idea still exists in the judge mind. The precedent play an important role before the Civil Code is put in force. The precedents of Dali Yuan can be considered as source of law. The legal system during this period can be called the amalgamation of Roman law and common law.