Regarding the 6% annual average rate of growth in using the electricity in the country and the necessity of setting up more than 3000 MW additional power plants, it is necessary to prioritize the kind of power plant based on the range of criteria. In this study by considering the different economic, environmental, political and social and technical criteria, power security and by using the Analytical Hierarchy Process for weighing these criteria and evaluating the amount of qualitative criteria and PROMETHEE method to calculate the amount of quantitative criteria, we have evaluated and prioritized different alternatives in generating the electricity. Among the 23-criteria determined by the experts, the Levelized Cost of Energy for each KW is in the first grade, the security of securing the entrance resource is in the second grade, the initial investment is in the third grade, the effect on keeping and saving the terminable resources is in the fourth grade and the impact on the diversification of the supply system is in the fifth grade. And finally three criteria affecting on other nations (soft power), knowledge spillover and the amount of the land used for power plant can be utilized. The results of this study show that, wind, hydro-electric, photovoltaic, combined cycle, nuclear, gas and steam power plants are the priorities.