In this paper, driving forces for the renewable-energy sector have been ranked with using a hybrid approach. Identification of driving forces' importance is a crucial step in national foresight projects or strategic planning in energy management area. So, firstly, the review of the literature and the opinions of experts and fuzzy Delphi method are used to identify and classify of driving forces for renewable energy. Secondly, the classification of driving forces is examined with using the fuzzy DEMATEL method and their causal relationships. In the final stage, we used results from prior stage to rank driving forces with an analytical network process. The results show that the technology capability and political stability are the most important driving forces for renewable energy that can be used for creating scenarios and strategic planning.