The need and use of energy is one of the major problems for all countries. The reserves in the ground are very limited while their use grows significantly every year. In addition to this scarcity problem, the burning of fossil fuels releases all manner of pollutants into the air with dangerous effects on human health, and greenhouse gases that threaten the environment. The quality of effective use of energy sources plays a vital role in the economic growth and development of a country. A country's level of development in terms of energy can be monitored by two key indicators: One is energy consumption per capita, the other energy efficiency. In this context, ensuring the diversity of energy technology is a key factor of a sustainable energy politics. In this present study, we especially focus on choosing the best alternative to improve energy efficiency in business. In this context, this question may be analyzed via the survey method. We compare energy efficiency improvement alternatives of the computer use method’s in offices by TOPSIS methodology that is one of the multi-criteria decision making techniques.