Demand response plays an important role in helping to maintain the stability of the power system, improve the consumption capacity of renewable energy, reduce the peak valley difference of the power system, and delay the construction investment of the power grid. The real-time demand response based on real-time price pushes the demand response to a new height from real-time and optimal. Based on the analysis of the existing problems of quasi real time price, this paper puts forward the basic characteristics of real-time price, and puts forward a new form of demand response:real-time demand response. In the specific algorithm, based on the load adjustment capacity model of single equipment potential aggregation method, a complete mathematical model of real-time demand response is established, and its solution and benefit evaluation process are clarified. The effectiveness of the real-time demand response model is verified by case analysis, and the model is proved to be suitable for fast real-time calculation for real-time price.