Abstarct: In this study, an energy audit and the potential for improvement with combine cooling heating and power systems and renewable systems at the Faculty of Mechanical Engineering and Civil Engineering of Shahroud University of Technology were considered as a sample of an educational building. Field, analytical and experimental studies were conducted to compare, evaluate, and evaluate various energy efficiency measures. The results of various senarios of recovery including the use of engine gas generators, solar water heaters, solar panels, as well as the Rankine organic cycle, indicate that the use of a 1,119 kW gas engine generator a minimum return time of less than one year has a companion. The return on investment of the solar heating system, especially the vacuum tube, due to the gas price paid by the university, has no logical return on investment, which means that the investment does not have economic justification for this. Taking into account the global cost, solar water heaters are economically justified. With increasing engine power, its return on investment is less than that of a lower-power engine. Toluene fluid at a higher temperature is a higher efficiency and suitable for heat recovery from a gas engine generator engine. The MDM fluid is suitable for lower temperatures. It is therefore suitable for recycling boiler combustion products. Analytical results are different from 2 to 9% for solar thermal systems. The fastest return on capital for the scenario is to improve the engine power of the generator 1 into the system and sell electricity to the network with reference to the reference currency of 0.85 years. The slowest scenario for the improvement of vacuum tube heaters, taking into account the free dollar, is 46 years. The net present value for the scenario is to improve the power of the generator engine with a power of 1119 kW to the system and sell electricity to the network with reference to the reference currency, which amounts to 11.5 billion USD. The lowest net present value for the scenario is the improvement of vacuum tube heaters considering the free dollar, its value is negative 5 billion USD. This means that the return on investment over the life of the project has not yet taken place. The lowest domestic return rate for vacuum tube boilers is given by the free dollar, which is 12.2%. And the largest one for scenario 1 is the generator engine one, which is 6.5%.