AIR-CONDITIONING CONTROL DEVICE, AIR-CONDITIONING SYSTEM, AIR-CONDITIONING CONTROL METHOD, AND AIR-CONDITIONING CONTROL PROGRAM

An air-conditioning control device with improved estimation accuracy regarding a startup time of an air conditioner in a case where a machine learning model learning of which is performed in a state in which sufficient data is not stored is used is acquired.An air-conditioning control device to estimate a startup time of an air conditioner on the basis of a machine learning model which has performed, by using a training data group including a dense region and a sparse region having less training data than the dense region, learning for estimating the startup time of the air conditioner from air-conditioning data which is information regarding control of the air conditioner includes: an air-conditioning data acquisition unit to acquire the air-conditioning data; a determination unit to determine whether or not the air-conditioning data is present in the sparse region; an estimation unit to, in a case where the determination unit determines that the air-conditioning data is present in the sparse region, apply extrapolation using a non-learning model for associating the air-conditioning data with the startup time to the machine learning model, and estimate the startup time of the air conditioner from the air-conditioning data by using the non-learning model; and a control unit to perform control to start up the air conditioner at the startup time estimated by the estimation unit.