An air-conditioning control system configured to control air-conditioning equipment installed in a building, the air-conditioning control system comprising: - a heat load prediction unit configured to predict a change over time of a heat amount to be processed by the air-conditioning equipment based on provided heat load prediction data; - an operation plan creation unit configured to previously create an operation plan of the air-conditioning equipment in an air-conditioning operation plan application period to reduce one of a power consumption amount and a running cost of the air-conditioning equipment serving as an evaluation index under a first restrictive condition that a total process heat load be maintained at one of a same level and within a range of a predetermined amount of difference and that a temperature in a room be maintained within a predetermined comfortable temperature range; - an operation plan correction unit configured to correct the operation plan in a predetermined cycle during execution of control of the air-conditioning equipment in accordance with the operation plan; and - a temperature sensor configured to measure the temperature in the room, and characterized in that; the operation plan creation unit and the operation plan correction unit include a temperature prediction block (43, 47) configured to predict a change over time of the temperature in the room based on provided temperature prediction data, wherein when an actually measured temperature measured by the temperature sensor is different from a predicted temperature predicted by the operation plan creation unit at a time of creation of the operation plan, the operation plan correction unit predicts a change over time of the temperature in the room in a correction application period in the plan application period, in which correction is performed, and corrects the operation plan to minimize the evaluation index under the first restrictive condition, with a second restrictive condition set as that an error between a predicted temperature predicted by the operation plan correction unit and the predicted temperature predicted by the operation plan creation unit be maintained within a predetermined allowable fluctuation range at one time or a plurality of times in the correction application period. - a heat load prediction unit configured to predict a change over time of a heat amount to be processed by the air-conditioning equipment based on provided heat load prediction data; - an operation plan creation unit configured to previously create an operation plan of the air-conditioning equipment in an air-conditioning operation plan application period to reduce one of a power consumption amount and a running cost of the air-conditioning equipment serving as an evaluation index under a first restrictive condition that a total process heat load be maintained at one of a same level and within a range of a predetermined amount of difference and that a temperature in a room be maintained within a predetermined comfortable temperature range; - an operation plan correction unit configured to correct the operation plan in a predetermined cycle during execution of control of the air-conditioning equipment in accordance with the operation plan; and - a temperature sensor configured to measure the temperature in the room, the operation plan creation unit and the operation plan correction unit include a temperature prediction block (43, 47) configured to predict a change over time of the temperature in the room based on provided temperature prediction data, wherein when an actually measured temperature measured by the temperature sensor is different from a predicted temperature predicted by the operation plan creation unit at a time of creation of the operation plan, the operation plan correction unit predicts a change over time of the temperature in the room in a correction application period in the plan application period, in which correction is performed, and corrects the operation plan to minimize the evaluation index under the first restrictive condition, with a second restrictive condition set as that an error between a predicted temperature predicted by the operation plan correction unit and the predicted temperature predicted by the operation plan creation unit be maintained within a predetermined allowable fluctuation range at one time or a plurality of times in the correction application period.