Carrying the responsibility for state sovereignty in a multi-national organization spread over the European territory has often brought dilemmas about the division of powers between the member states and the preservation of the sovereignty of a state against the ambition to strengthen the common sovereignty of the EU. Many countries that have been integrated into the supranational organization have been forced to review and change their Constitutions to harmonize the jurisprudence system. Therefore, the unification and strengthening of the jurisprudence system is the key factor for guaranteeing common sovereignty within the EU. With the direct revision of the Constitution of a state that has joined or aspires to join a justice system with common values in the European Union, the aim is to guarantee the future of the sovereignties of all member states. With the unification of sovereignties in a common sovereignty within the EU, lasting peace and well-being for all citizens will be strengthened and ensured.