Support system for working vehicle

A support system for a working vehicle, the support system comprising:

• a working vehicle including a vehicle body, a controller, and a communicator, the vehicle body being operable to travel selectively under manual steering using a steering device or under automatic steering using the steering device, the controller being configured or programmed to define a planned travel line for the automatic steering based on a reference line and to control the automatic steering, the communicator being configured or programmed to receive a replacement line to replace the reference line defined by the controller;
• and
• a server to transmit the replacement line to the communicator;
• wherein
• the controller is configured or programmed to:
• include a status acquirer to acquire a status of a device provided in or on the working vehicle;
• and
• switch between a first mode and a second mode in accordance with the status acquired by the status acquirer, the first mode being a mode in which the controller replaces the reference line with the replacement line transmitted from the server, the second mode being a mode in which the controller does not replace the reference line with the replacement line transmitted from the server.