IT system

An object of the present invention is to provide an IT system capable of easily and reliably transmitting/receiving data. An IT system includes: an ID issue and management engine for issuing and managing an RFID having a unified data format; an S-label recording device for recording various kinds of data including an RFID on a later-described S-label; a scanner for reading data recorded on the S-label; a computer device for fetching data read by the scanner; a server connected to the computer device through a network; and a mobile communication terminal for performing wireless communication with respect to the server. In order to utilize the S-label on which the RFID having a unified data format is recorded for transmission/reception of various kinds of information, data formats exchanged on a network can be unified, which facilitates construction and change of the IT system.