A conveyance system includes a feeding device, a reading device, a weight measuring device, a storage device, a notification device, and an arithmetic control device which compares the number of pickings of the articles obtained by dividing a difference between the reference weight value and a measurement value after operation as a weight of the container after picking of the articles by the unit weight, with the number of incoming orders, determines whether there is an excess or deficiency, and when there is an excess or deficiency, notifies the excessive or deficient number of articles by the notification device.