本文主要係從分析歐洲法院（European Court of Justice）的案例著手探討WTO各項協定在歐洲聯盟法律體系中的地位與效力等議題。關於WTO各項協定在歐洲聯盟中的法律地位，從案例分析中可見歐洲法院認為該等協定的內容構成歐盟法律體系的一部份。不過此時我們將先討論WTO各項協定的性質問題，蓋因此議題牽涉到國際協定是否為歐盟的專屬締約權能範疇內以及歐洲法院是否對該協定的條款具有解釋的管轄權限。在WTO各項協定的法律效力方面，本文重在討論協定之內容是否具有直接效力（direct effect）的議題，亦即個人或歐盟會員國可否依據該協定中的特定條款在會員國法院或歐洲法院中請求其權利，從案例分析中可見歐洲法院傾向於否定的立場，本文亦將分析歐洲法院所持的論點與主張。

This article will discuss ECJ (European Court of Justice) case-law about legal status and effect of WTO Agreements in EU (European Union) legal system. From the ECJ case-law, we conclude that WTO Agreements form an integral part of EU legal system. At this time, we should discuss the character of WTO Agreements, because it relates the issues about EU's exclusive competence and ECJ's explanatory jurisdiction. Then, the “direct effect” of WTO Agreements will be discussed by examined ECJ case-law. Only when the particular provision of WTO Agreements having direct effect, ECJ could review measures adopted by EU in the light of WTO Agreements. But we will find that ECJ always denied the direct effect of WTO Agreements on the grounds of “reciprocity” and “dispute settlement procedure”.