RFID System stores information such as mold information, shot count, date of first use, and molding conditions to an ID Tag mounted to the mold. It reads 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, it also reads the shot count, and checks that the mold is within its service life specifications. After the molding process is completed, it writes information (e.g., shot count) from the molding machine to the ID Tag (Data Carrier).