This article explores the territorial extension of the EU environmental law and how the EU uses its market powers to become global regulatory initiatives in the context of environmental protection. The legitimacy and practical influence of the global reach of the EU environmental law is first to be discussed. Taiwan, as a significant trade partner to the EU and also a critical exporting-oriented industrial entity in the world, has been heavily influenced by the EU environmental law development for the sake of gaining market access to the EU. In this regard, this article provides an overview of the EU environmental law. This article will provide a case study on the territorial effects of the EU environmental law on Taiwan and the responsive actions taken by the government and industries in Taiwan. This article recognizes the importance of the EU to achieve legitimate global values in the context of global environmental protection.