there is provided an image forming system that automatically discharges paper sheets other than poorly fed ones without making an emergency stop , even when poor paper feeding is caused due to a paper jam or the like . at paper feeding , information showing poor paper feeding is transmitted when the poor paper feeding is detected in supplying the paper sheets . at image forming , a determination is made whether the paper conveyance in forming the image is continued or stopped when an instruction , based on the information showing the poor paper feeding . at paper discharging , a determination is made whether the paper conveyance in discharging the paper sheets is continued or stopped when an instruction , based on the information showing the defective conveyance .