In this recent years, energy security has been actively studied. European vitality security challenges have changed significantly in the previous 20 years. From one viewpoint, the current strains amongst Russia and the EU are undermining heir verifiable organization on vitality; on the other, profound changes in the vitality scene at the worldwide level, activated by innovative advances and major geo-political changes, are driving the EU to revaluate its vitality security system. The point of this paper is to talk about Eastern Europe vitality security in a changing worldwide. Furthermore, this paper will give a review on the energy market and the energy security strategy in Eastern Europe country.