Criminal activities are becoming more frequent, ranging from theft, smuggling, and trafficking of narcotics to activities such as human trafficking, drug counterfeiting, and offenses in the field of commercial law. Above all, criminal activities do not seem to know any limits. Prosecuting authorities run the risk to waste their resources mainly in the case of criminal jurisdiction conflicts. Therefore, the International Criminal Police Organization (INTERPOL) and the European Police Office (EUROPOL) possess a central role. The aim of this thesis is to provide an overview of the nature of these two security organizations and also to give an insight about the structure, the operating principles, the tasks and the methods as well as the limits of cooperation between those two security organizations. Furthermore, the different joint operations, in connection with the fight against international crime, which has recently gained a strong importance, and the cooperation with the Austrian authorities is represented. The development of INTERPOL and EUROPOL is confronted repeatedly with new hurdles and requires a steady expansion of information exchange in order to continue to support national security authorities in the prevention of crime.