It is usually sought a way to understand or prove a theory, in the scientific environment. The best way to promote and develop a study, is through mathematical proof, which may be through formulas, often already known, promoting modeling in different scenarios. There are a few different ways to achieve environmental improvements aiming the reduction of greenhouse gas emissions (GHG) in the countries. But is it enough to aim the achievement of a country s targets in a country for the Government to move toward improvements? It is through energy policies that one can achieve the biggest economic gains. The activity of energy efficiency is developed by an ESCO (Energy Saving Companies). These have in their scope to promote technical audits, in order to promote the implementation of energy efficiency measures responsible for the achievement of economic goals in energy consumption. The best way to understand the logic of the development of actions in a country is through its policies and, in this case, the focus is on industrial energy policies. In a global analysis, seeking the understanding of how countries have positioned themselves in the face of these challenges, and comparing with what has developed in Brazil s case, one can come to some conclusions as to what are the best ways, and what are the barriers. In the study developed in this dissertation, while seeking for a better understanding, it was found enough information on energy efficiency policies, understanding that it is an important vector in meeting future energy demand and energy security, reinforcing the comprehension that energy efficiency requires an integrated vision regarding the stakeholders, like the government, the private sector and society in general. Since 1984, Brazil has already been deploying mechanisms and public policies related to promotion of energy efficiency, as the PBE, Procel, Conpet, energy efficiency Law, electric motors regulations, vehicle and construction establishing labeling thresholds for incandescent bulbs and your banishment.