With regard to the contradiction between sharp transmission power loss and insufficient peak load regulation capacity caused by long-distance wind power transmission, it is proposed that high-energy load participate in conventional peak load regulation to realize energy-saving with wind energy consumption. Based on in-depth analyses of regulation features of high-energy load and influences that it may make on peaking, energy-saving indexes, considering power grid, power supply and high-energy load, are comprehensively proposed. In addition, comprehensive assessment of energy saving is made on peak load regulation scheme based on source-load coordination with the method of synthetical fuzzy evaluation. The simulation results show that the index system and method is effective and feasible in terms of evaluation of energy-saving on peak load regulation scheme based on source-load coordination. This work is supported by the Twelfth-five National Research Program of China (No. 2015BAA01B04) and the Major S&T Projects of State Grid Corporation of China (No. 52272214002C).