A vehicle lamp system 1 includes a plurality of light source units 22R and 22L and a controller 14 which controls the plurality of light source units 22R and 22L. The controller 14 sequentially turns on the plurality of light source units 22R and 22L when signals for operating a vehicle 10 are input. Thereby, it is possible to call attention to surrounding vehicles or pedestrians when starting the vehicle 10. The vehicle lamp system 1 can call attention to surrounding vehicles or pedestrians when starting a host vehicle.