Store information such as mold information, shot count, date of first use, and molding conditions to an ID Tag mounted to the mold. Read the mold information and molding conditions from the ID Tag using an Antenna (R/W Head) mounted to the molding machine. At the same time, read the shot count, and check that the mold is within its service life specifications. After the molding process is completed, write information (e.g., shot count) from the molding machine to the ID Tag (Data Carrier).