The invention discloses the demand response capability assessment method of an intelligent power grid and calculating equipment used for executing the method. The method comprises the following stepsof establishing the reliability model of a generator set, wherein the reliability model includes the output power function of the generator set; establishing the responsive capacity model of demand response, a user participation degree model and a load rebound model respectively, wherein the three models include the response demand function of a user, a participation degree function and a load rebound electric quantity function; according to the three models, establishing the load demand model of the demand response, wherein the load demand model includes the load demand function of the user;according to the reliability model and the load demand model, establishing the confidence capacity model of the demand response, wherein the confidence capacity model includes the confidence capacityof the demand response; and acquiring the historical data of the intelligent power grid, according to the historical data, solving the confidence capacity model and acquiring the confidence capacity of the demand response of the intelligent power grid.