Abstract: A control system controls an air conditioner that air-conditions an air conditioning target area using a detection value of a biometric sensor worn by a user, the control system includes a processor that performs a first acquisition that acquires first information related to a distance between a reference point of the air conditioning target area and the biometric sensor, a first determination that determines whether to use a detection value of the biometric sensor for controlling the air conditioner based on the first information and a determination criterion, and a second determination that determines the determination criterion.