Abstract: An agricultural assistance system includes an input to receive size information of a working device linked to an agricultural machine and job setting(s) for an agricultural job performed on an agricultural field, a route creator to create a travel route for the agricultural machine on a map representing the agricultural field based on the size information and the job setting(s), a status detector to detect a status of the agricultural job, a recorder to, when the agricultural job is interrupted, record interruption data including the size information, the job setting(s), and a result of detection by the status detector associated with identification information of the working device, and a notifier to, if the size information is changed during interruption of the agricultural job, provide a notification indicating that the size information has been changed, when the agricultural job is to be resumed based on the interruption data.