Ukrainian crisis evolved due to incompatibility between the objectives of the European Union, established by the Eastern Partnership and geopolitical interests of the Russian Federation. It generated considerable repercussions on European security system, constituting, simultaneously a renunciation of the use of International Law as a tool for regulating the conduct of states in Eastern Europe. Ukraine suffered dramatic consequences as a result of the annexation of the Crimea peninsula by the Russian Federation and the outbreak of armed conflict in Lugansk and Donetsk. Ukrainian crisis leaded Republic of Moldova to review its security system to eliminate internal and external risks that increa-se the lack of security of the state. Moldovan security system must be adapted to the new regional geopolitical context because Ukrainian crisis outlined a num-ber of worrying trends for Moldova..