An agricultural work vehicle (1) capable of communicating through a communication device with a host computer (400) and capable of being steered by a remote control device (112) so as to make it possible for the agricultural work vehicle (1) to link with the host computer and perform in an optimum work form, wherein the agricultural work vehicle (1) is provided with a position calculation means for measuring the position of the machine body using a satellite positioning system, a steering actuator for operating a steering device, a shifting means, and a control device for controlling the above elements. 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 (400) to the control device (30) of the agricultural work vehicle (1). The agricultural work vehicle (1) is controlled and caused to work at the optimum working speed and the optimum work driving value along a set travel path (R).
