An object is to display, on a display unit, a display screen with excellent operability for a user. This invention includes: a position information obtaining unit for obtaining position information on a work vehicle based on positioning correction information supplied from a first reference station； a region shape determination unit for determining a shape of a specific region where the work vehicle performs autonomous travel, based on positioning correction information supplied from a second reference station； and a display control unit for displaying, on a display unit, a specific region indication section H indicating the specific region determined by the region shape determination unit, wherein the display control unit displays the specific region indication section H in a display mode that varies between a case where the first and second reference stations are identical and a case where the first and second reference stations are not identical
