Under the background of the development of renewable energy, the“source-demand”interactive optimal scheduling strategy taking into account the cost of carbon trading（CT） and green certificate（TGC）is investigated. The proposed model considers generation resources and 3 kinds of flexible loads including shiftable loads, transferable loads, and curtailable loads. The cost considers CT -TGC cost and load scheduling cost. Taking the overall cost as the objective, the optimization model is developed to realize the optimal allocation of generation resources and various flexible loads. Testing examples verifiy the effectiveness of the proposed method.