The fast economic growth and the growing middle class in China, and all around the world, has come with a price, where natural resources are disappearing and the environment is threatened by contamination. These consequences have lead many countries to work together to contribute to lowering the dangerous Carbon Dioxide emission and to implement renewable energy, the green energy. A few countries in the west have already come pretty for in their innovation for a greener future, such as Denmark. But other countries are having more difficulties keeping up with the economic growth as well as tacking the environmental burden, such as China. China has with their increasingly active position in the international community shown interests and willingness to participate in lowering the pollution and bad emissions. These motives are also visible in China's new legislations and future goals. The two countries, Denmark and China, have already established a relative a reliable cooperation going years back. This thesis aims at looking in to the question of “To what extent does governmental structure affect Sino-Danish energy Cooperation?”. This relationship is a important cooperation where, Denmark as a pioneer I renewable energy field, can work together with China whose economic growth has stunned the world. To approach this question I have turned to a theory within the international relation field as well as looking at theories to explain the construction of political structures. By using different theories it has been possible to look at the reasoning of cooperation as well as at the political structures that could determine the cooperation’s outcome. The study is further divided into different section starting by giving a contextual background working it’s way though the understanding of the need for cooperation, and describe the mutual benefit for Sino-Danish cooperation. The outcome shows that national identity affects national interests in which can change over time. The Renewable energy cooperation between Denmark and China thus create a profitable situation for both countries, both political and economically. However the main problem formulation is asking how the different political structures affect cooperation. The conclusion shows that although they have different national approaches they both cooperate on a national level where then further structural development may or may not take place within the country.