Vehicle control method, vehicle controller, and server

A vehicle control method applied to a system including a vehicle controller arranged on a vehicle and a server configured to communicate with the vehicle controller, the vehicle controller including a first storage device configured to store operating data used when operating an electronic device of the vehicle, the vehicle control method, comprising:

• executing a state obtaining process that obtains a state of the vehicle based on a detection value of a sensor arranged on the vehicle with processing circuitry;
• executing an operating process that operates the electronic device based on the state of the vehicle obtained in the state obtaining process and the operating data stored in the first storage device with the processing circuitry;
• executing an environment information obtaining process that obtains environment information with the processing circuitry, the environment information being information related to a traveling environment, and the traveling environment being an environment in which the vehicle is traveling;
• executing an environment determination process that determines whether the traveling environment indicated by the environment information obtained in the environment information obtaining process is changed with the processing circuitry;
• and
• when the environment determination process determines that the traveling environment is changed, executing a data changing process that causes the vehicle controller to obtain the operating data corresponding to the environment information from the server and causes the first storage device to store the operating data with the processing circuitry.