An auto lighting system that performs lighting control that corresponds to the driver's visual perception is provided. An auto lighting system 1 includes imaging means 2 for capturing an image of the road ahead of a vehicle and lighting control means 3 for turning on or off lights such as headlights based on the image of the road ahead of the vehicle captured with the imaging means 2. The brightness ahead of the vehicle as perceived by the driver is recognized based on the image of the road ahead of the vehicle captured with the imaging means 2, and lighting control in which lights 101 are turned on or off is performed based on the brightness ahead of the vehicle.