This research paper looks into the analysis of Sino-Russian energy relationship.Since the major achievement of Sino-Russian energy relationship is the breakthrough in the oil and gas pipeline agreements,the thesis research question is to explore factors which determined SinoRussian oil and gas deals.This research will use the theory of Neorealism to figure out the ways to fulfill interests of both sides,and the level-analysis method to organize the writing.The novelty of this research is to reveal the Russian perspective on Sino-Russian oil and gas deal and to fill the gaps which Chinese,Russian and Western scholars have not yet touched upon regarding the process of negotiation,and to explore the relevance of sanctions in announced by Russia “Pivot to the East”.Among the explored factors,the key one that made for China even possible to let itself involved in a competition with Japan for Russian oil pipeline is the necessity of the energy supply diversification.In terms of the Power of Siberia gas pipeline,the SinoRussian advanced military defense equipment trade also seemed to be the Chinese major key reason.From the Russian perspective over the ESPO oil pipeline negotiations,the key factor at that time was the constant rise in energy prices.In addition,the Russian major key reason for the Power of Siberia gas pipeline became the creation the Unified Gas Supply System,construction of which could enable Russia to supply gas in two strategic directions – East and West one.Finally,the explored factors demonstrate that through these two contracts,China and Russia showed the precedent in the international relations when negotiations between countries result in an advantageous win-win situation.