Information processing method and information processing system

An information processing system using a computer, the information processing system comprising:

• a first obtainer that obtains first position information indicating a first position, the first position being a position of a vehicle that is a monitoring target;
• a second obtainer that obtains second position information indicating a second position, the second position being a position that is on a running route of the vehicle and that has not yet been reached by the vehicle, and being a position with respect to which monitoring is requested;
• a determiner that determines a monitoring priority level of the vehicle according to movement information relating to movement of the vehicle from the first position to the second position;
• and
• a presentation controller that generates presentation information for monitoring the vehicle based on the monitoring priority level, and causes a presentation device to output the presentation information.