PROBLEM TO BE SOLVED: To efficiently and simply create routes for making an autonomous travelling work vehicle autonomously work even when changing the number of working vehicles in the midst of working and the like.SOLUTION: A work mode setting unit 33 is configured to change a work mode in accordance with the number of working vehicles received by the number-of-working vehicles change reception unit 36, and a route creation unit 32 is configured to replace other working routes excluding working routes in which a work is scheduled in a pre-changed work mode of scheduled working routes with one or more modified working routes including a first modified working route in which an autonomous travelling working vehicle autonomously works in accordance with a post-changed working mode and the post-changed number of working vehicles.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT
