In an information code reader, an image is imaged by an imager. An information code contained in the image is quantified depending on light-dark levels thereof (tones, color depths, or luminance levels thereof), thereby providing cell information by this quantification. The obtained cell information is transmitted to from the information code reader to a server. In the server, based on the cell information received from the reader, the information code imaged by the imager is decoded. Decoded information is transmitted to the information code reader so that the reader is perform control based on the decoded results.