In the historical development of the international criminal justice, critisms, problems and interpretations on the established courts and proceedings has a significant place in terms of ensuring of international criminal justice. Therefore, in the continuation of the process that started with the Nuremberg trials, it is a necessity to evaluate the characteristics and case-laws of the Former Yugoslavia Tribunal and the Rwanda Tribunal and to reveal the doctrinal views on these courts for the development of the International Criminal Tribunal. First of all, the ICC should be shaped by taking into account the criticisms of "victor’s justice" and "no crime and punishment without law" against the Nuremberg trials. Therefore, it should be ensured that the definitions, elements and contents of the crimes that will be subject to the ICC's judgment as an international crime should be properly regulated and trials be conducted in accordance with the principle of "no crime and punishment without law". In addition, it should be secured that every possible crime that will harm the international community is taken into account in the regulation of international crimes, so that no international crime goes unpunished. In particular, ensuring that as many states as possible become parties to the Rome Statute, which established the ICC, is crucial in terms of increasing the legitimacy of the international criminal justice system.