In this autonomous travel system for an agricultural work vehicle 1, the autonomous travel of the agricultural work agricultural work vehicle 1 is controlled by a remotely operated device 70 that is capable of communicating with the agricultural work vehicle 1. In addition, autonomous travel by the agricultural work vehicle 1 is prohibited if the device-side software version for the remotely operated device 70 and the vehicle-side software version for the agricultural work vehicle 1 do not match.