A component mounting system which is configured to set multiple feeders to be capable of being exchanged in respective feeder setting areas of multiple component mounting machines which are arranged along a conveyance path of a circuit board, to convey the circuit board to the multiple component mounting machines in order and to mount components which are supplied from the multiple feeders onto the circuit board using each of the component mounting machines to produce a component mounted board, the component mounting system comprising: a feeder stocking area in which feeders to be exchanged with feeders for which exchanging is necessary from among multiple feeders which are set in the feeder setting area of each of the component mounting machines are caused to wait; and an exchanging robot which is configured to remove the feeders for which exchanging is necessary from the feeder setting area of each of the component mounting machines, is configured to remove the feeders to be exchanged with the feeders for which exchanging is necessary from among the multiple feeders which wait in the feeder stocking area, and to set the feeders in the feeder setting area of the component mounting machine, the component mounting system being characterized in that in a case in which a board type to be produced in each of the component mounting machines is switched, the exchanging robot is configured to perform feeder exchange work before board type switching in parallel with component mounting work onto a final circuit board before the board type switching, and in the feeder exchange work before the board type switching, the exchanging robot is configured to remove feeders which are not used in production after the board type switching from among feeders for which supplying of components which are necessary for component mounting work onto a final circuit board of the production during production before board type switching is completed from the feeder setting area of the component mounting machine and is configured to collect the feeders which are not used in the production in the feeder stocking area, and to remove the feeders which are used in the production after the board type switching from the feeder stocking area and to set the feeders in the feeder setting area of the component mounting machine. a feeder stocking area in which feeders to be exchanged with feeders for which exchanging is necessary from among multiple feeders which are set in the feeder setting area of each of the component mounting machines are caused to wait; and an exchanging robot which is configured to remove the feeders for which exchanging is necessary from the feeder setting area of each of the component mounting machines, is configured to remove the feeders to be exchanged with the feeders for which exchanging is necessary from among the multiple feeders which wait in the feeder stocking area, and to set the feeders in the feeder setting area of the component mounting machine, the component mounting system being characterized in that in a case in which a board type to be produced in each of the component mounting machines is switched, the exchanging robot is configured to perform feeder exchange work before board type switching in parallel with component mounting work onto a final circuit board before the board type switching, and in the feeder exchange work before the board type switching, the exchanging robot is configured to remove feeders which are not used in production after the board type switching from among feeders for which supplying of components which are necessary for component mounting work onto a final circuit board of the production during production before board type switching is completed from the feeder setting area of the component mounting machine and is configured to collect the feeders which are not used in the production in the feeder stocking area, and to remove the feeders which are used in the production after the board type switching from the feeder stocking area and to set the feeders in the feeder setting area of the component mounting machine.