A component mounting system includes a component mounting line in which a plurality of processing devices are connected to constitute the component mounting line and a management device (management computer) connected to the component mounting line by a network, and each of the plurality of processing devices can be remotely operated via the network by an input unit of the management device. In this component mounting system, a remote operation right allowing a remote operation is set with respect to the management device (ST21), and the remote operation right set with respect to the management device is released (ST23) in a case where a specific operation set in advance with respect to the one or more processing devices is performed (Yes in ST41) in a state where the remote operation right is set with respect to the management device.