A communication system is provided which achieves more comfortable user operations when an electric device, which is remotely operated by use of a remote control (remotely operating device), performs processings or operations using an information recording medium. Remote control data, remote control commands and reader/writer commands are stored into command data (cmdDATA) in packets of the same format and then transmitted, while reader/writer command data (rwDATA), the data length of which is long, and a reader/writer communication footer (parity for error check and the like) (rwFT) are divided and stored into the command data (cmdDATA) in the communication packets and then transmitted, and received and combined.