Machining processes are spent a lot of energy in the manufacturing industry. On the other hand, we understand that energy should be minimum. The purpose of this study is to find the optimal machining parameters that allow the most energyefficient processes. The study focused on optimization of parametric process machining on combination energy consumption and material removal rate in machining on Steel ST 41-3. The data were evaluated using the Taguchi method and TOPSIS (Technique for Order Preference by Similarity to Ideal Solution). Finally, the research has successfully to get the best parameter of machining are cutting speed of 22.8 (mm / min), feeds (0.01 mm/tooth) and the depth of cuts (1.5 mm). At the parameter machining setting have the lowest energy used level.Experiments in this study will be carried out in a laboratory scale, and the results of these experiments can be used as a reference in its application in the industrial world.