The control method according to one aspect of the present disclosure is a method of controlling an apparatus which adjusts a bed ambient temperature for a user, the method including obtaining one of measurement information in a sensor and setting information of the apparatus; estimating the bed ambient temperature and one of getting in bed, starting of sleep, and falling asleep by the user, based on the one of the measurement information and the setting information; and when a first temperature is the bed ambient temperature before the user gets into bed, starts sleeping, or falls asleep, changing the bed ambient temperature to a second temperature, which is lower than the first temperature by 0.5° C. or more, in a period after the user gets into bed, starts sleeping, or falls asleep and before a non-shallow sleep state of the user ends.