This paper entitled with GIS based decision support system and data base for contribution towards sustainability of future earth related to Geopolitics of oil in the world. With the help of GIS we are analysis or mapping the over exploited area of oil resources, oil sites of the world, oil pollution, oil spill and marine environment, geopolitics over oil resources, political instability etc. These types of maps will help to us for the planning or the sustainable use of these resources and we predict a better future for the earth. This study provides us the global view of oil geopolitics and its impact on our environment.GIS plays a very important role for the identification of those sites which are more exploited or vulnerable and it’s also very helpful for the sustainable conservation of our present oil resources in the world. This study is also deals with the oil production, consumption and reserves in the world and we also describes how the GIS plays a very important role for the oil sustainability in the world.