A bypass transporting path apparatus is disposed on a color image recording apparatus and a transporting path connecting apparatus is disposed between a front portion of a monochrome image recording apparatus and a rear portion of the color image recording apparatus. This system includes an operational state monitoring portion that monitors the operational states of the color image recording apparatus and the monochrome image recording apparatus, and a power supply controlling portion that performs control based on the operational states of the color image recording apparatus and the monochrome image recording apparatus to shift any one image recording apparatus to a power saving state and to make the other image recording apparatus wait in a recordable state.