The main focus of this paper involves determining Iran’s energy system features, acknowledging energy modeling approaches by making a good scenario for the developing countries and developing scenarios using these confirmed models for simulating the transfer of energy compatible with the environment. This approach which is carried out through the multi-purpose optimization proposes an alternative to design an energy system based on the economic and environmental norms. In addition this paper mentions the chances and the consequences of transferring the replaceable energies and the potential paths to come. Thus, determining and modeling of the energy system is dealt with and the required strategic program to solve the country’s energy system problems are shown through the basic structure, the mixed program framework and the practical & case studies so as to prepare the scenarios to transfer the renewable energies Iran. These scenarios are based on the present economy depending upon the fossil fuel, and the aims of government for an economic future relying more on the renewable energies. This paper also tries to predict the plans for the country’s future energy using the alternative energy planning systems (such as simulator application of LEAP). At the end of the paper, analyzing the data and the conclusions is done.