Energy consumption management according to lack of resources and the increasing cost of non-renewable energy and as well as the environmental impacts due to its indiscriminate utilize is unavoidable. Therefore, the purpose of this study was to investigate the energy flow and greenhouse gas emissions in industrial dairy farm at ferdowsi university of mashhad. total energy input and energy efficiency in production per liter of milk produced 7.73 MJ and 0.92, respectively. Data analysis revealed that two inputs including feed stock and fossil fuel with share of 64% and 23% were widely consumed in the production of energy resources, respectively. As what is accounted, both diesel fuel and electricity inputs with shares of 65% and 34% most greenhouse gas emissions, respectively. The results showed that about 35 percent of the needed electricity can be supplied with using the biogas system (clean energy).The total greenhouse gas emissions was calculated per head and per liter of cow milk produce 1295.1 and 0.14 kgCo₂- eq, respectively.