A component mounting system includes a head to revolve multiple suction nozzles in a circumferential direction, a lifting and lowering device configured to lift and lower a suction nozzle at a predetermined revolving position, a storage device configured to store any one of multiple pieces of directionality information in association with identification information of the suction nozzle, and a control device configured to acquire corresponding directionality information from the storage device based on the acquired identification information of the suction nozzle and to perform pickup of the component supplied from the component supply device at the spinning position in accordance with the directionality information.