We are living in an inter-connected, global digital society where the services of different operating systems are universal in nature, but many Internet activities are still being tackled by national laws and regulations. A long-existing question is which law is applicable in cases of Internet activities because the online world does not have any physical boundaries. How the European Union (EU) approaches this duality has become a concern for data protection laws. By analysing some recent Court of Justice of the European Union case laws, this article seeks to discover how the EU data protection law tackles disputes involving transnational issues online, which includes its extra-territorial application and cross-border data transfers. The article also indicates that there is an enormous gap between legislation and practice.