An electric-circuit fabricating system for fabricating an electric circuit, by
performing a working operation on a circuit substrate, including a substrate holding
device to hold the substrate, an imaging device to image a surface of the substrate
on which the working operation is to be performed, an imaging control device to
control the imaging device to take an image of a substrate-position fiducial mark
provided on the substrate, and obtaining substrate-position information on the
basis of the image, and a working device to perform the working operation on the
substrate, on the basis of the substrate-position information, and wherein the
imaging control device is operable to control the imaging device to take an image
of a substrate ID mark provided on the substrate as held by the substrate holding
device, for obtaining substrate identifying information identifying the substrate,
on the basis of the image of the substrate ID mark. Also disclosed are a method
and a control program for fabricating an electric circuit by performing the working
operation on the substrate.