A bill and coin processing system including a bill and coin processing apparatus having: an interface unit capable of exchanging information via a communication unit with the point-of-sales terminal machine; a money receiving unit receiving money by way of a price of a commercial product; a discriminating unit discriminating between at least denominations of the bills and coins received from the money receiving unit; a storing/discharging unit stored with the received bills and coins on the basis of a result of the discrimination made by the discriminating unit and capable of discharging the bills and coins by giving a discharge instruction to the bill and coin processing apparatus from the point-of-sales terminal machine; a money discharging unit discharging the bills and coins outside a machine, which have been discharged from the storing/discharging unit; and a control unit controlling the money discharging unit to discharge the bills and coins from the storing/discharging unit on the basis of a discharge instruction accepted by the interface unit and given to the bill and coin processing apparatus from the point-of-sales terminal machine.