Information processing method, information processing system, information processing device, and program

An information processing method executed by a vehicle system that controls an air conditioner of a vehicle via a communication line includes: an output step of outputting a user interface corresponding to a type of the air conditioner provided in a target vehicle; an acquisition step of acquiring a parameter related to air conditioning, the parameter being set via the user interface; and control step of issuing a control command for controlling the air conditioner of the target vehicle based on the acquired parameter.