An agricultural work vehicle capable of communicating with a host computer and capable of being steered by a remote control device so as to enable the agricultural work vehicle to link with the host computer and perform in an optimum work form, wherein the agricultural work vehicle is provided with a position calculation means measuring the position of the machine body, a steering actuator operating a steering device, a shifting means, and a control device controlling them. An optimum working speed and an optimum work driving value calculated from past and current weather information, field information, work information, work machine information, and crop information are transmitted from the host computer to the control device. The agricultural work vehicle is controlled and caused to work at the optimum working speed and the optimum work driving value along a set travel path.