歐洲的統合進程最初是開始於能源部門的合作：保障煤炭市場穩定發展的《煤鋼共同體條約》以及有關核能開發與利用的《原子能共同體條約》；因之能源政策在歐盟的戰略中有著重要的地位。 由於自然因素再加上北海油田產量正在萎縮，使得歐洲的能源（尤其是石油及天然氣）需要大量依賴外國進口；根據歐盟官方之預測，到了2030年，屆時歐盟使用的能源中有70%得靠國外進口，而石油及天然氣之使用更分別高達94%、84%的進口依賴性。2006年初俄、烏天然氣事件，使歐盟深感過度依賴俄羅斯的能源供應帶來潛藏的危機；因此歐盟力求「能源多樣化」以提高自身的能源安全。此天然氣紛爭促使同年3月的歐盟高峰會上各國領袖一致同意建立「歐盟共同能源政策」；然則在各會員國皆將能源政策視為本國主權的狀態下，歐盟建立「共同能源政策」的可行性有多高，是本文所欲探討的。 本文以歐盟簽署京都議定書為主軸，旨在闡述其對歐盟能源政策的影響；接著分析歐盟所面臨的能源挑戰、能源政策的演變、歐盟與能源輸出國（區域）的能源合作關係以及內部能源市場的整合。最後，評估「歐盟共同能源政策」的可行性。 Although the integration of Europe originated in the energy sector, because of the multilevel of EU polity and the differences among the member states, a common energy policy of the EU has yet to be realized. In order to confront the serious energy situation, it’s important to promote a common energy policy. The North Sea’s hydrocarbon resources has gradually declined and the EU’s energy import dependency continues growing to reach two thirds in 2030, which is up some 15% from today’s level. Import dependency for oil continues to be highest, reaching 94% in 2030. Gas import dependency rises substantially from somewhat over 50% at present to 84% in 2030. However, the Ukraine-Russia gas dispute in January 2006 had a crude light over Europe''s dependency on imports and on the shortcomings of keeping 25 separate policies with external energy suppliers. On 8 March 2006, the Commission issued a Green Paper spelling out options to achieve "sustainable, competitive and secure" energy supplies for Europe. One key aspect is to build a common external energy policy to co-ordinate relations with external suppliers such as Russia and OPEC countries; the other is to achieve the EU common energy policy. This thesis puts emphasis on how the Kyoto Protocol affected the EU energy policy; eventually, estimating the possibility for the EU to realize the common energy policy according to the inner and external elements.