A first capturing image unit mounted on a vehicle body captures an image of surroundings of a work vehicle. A second capturing image unit is disposed above the work implement and captures an image of an area in front of the work implement. A first image generation unit generates, from the image captured by the first capturing image unit, a surroundings composite image, which depicts the surroundings of the work vehicle in a bird's-eye view and is synthesized with a vehicle model depicting the work vehicle. A second image generation unit generates, from the image captured by the second image capturing unit, a work implement composite image, which depicts the area in front of the work implement and is synthesized with the vehicle model and the surroundings composite image. A display unit displays a display image including the vehicle model, the surroundings composite image, and the work implement composite image.