Provided is a vehicle light system using existing interior lamps and exterior lamps, the interior lamps and the exterior lamps cooperating to provide dramatic illumination. The vehicle light system can include: a lighting control unit that generates and outputs a control signal for controlling the turning on and off of both the exterior lamps and the interior lamps; a light source driving unit that drives the light source of any lamp of the vehicle lamp group on the basis of the control signal provided from the lighting control unit; an in-vehicle device that is mounted on the vehicle and that has a wireless communication function; a portable device that can be carried outside the vehicle by an occupant of the vehicle and that has a wireless communication function with the in-vehicle device; and an in-vehicle network configured to connect the in-vehicle device and the lighting control unit. The lighting control unit acquires positional information for the portable device through the in-vehicle network, and generates and outputs a control signal whereby both the interior lamps and the exterior lamps cooperate to provide lighting when the occupant enters a predetermined range. The commercial value of a vehicle light can thereby be increased.
