A system and method for improving a function of reading information from a Radio Frequency Identification (RFID) tag. The system includes RFID tags installed on a variety of objects, each RFID tag storing information of its associated object and upon detection of a signal based on an effective frequency range, transmitting the information; writers spaced apart at regular intervals and installed near the RFID tags, the writers writing an instruction of informing whether an area is one where it is possible to read the information from an RFID tag; and a terminal having a read-write tag in which the instruction by the writers is written at a time of entering the area where the RFID tags are installed, a terminal controller for determining a start or stop of the read function based on the instruction of the read-write tag, and an RFID reader for starting to read the information from the electronic tag based on the effective frequency range upon receipt of a start command from the terminal controller.