Method, device and system for reading embedded RFID tag

The invention discloses a method, a device and a system for reading an embedded RFID (Radio Frequency Identification) tag. The method comprises the following steps: sending a first request to each RFID tag in a detection range; generating a second request containing the to-be-verified random number identifier, sending the second request to each RFID tag in the detection range, determining the to-be-identified RFID tag based on the analysis of the response of the second request in a preset response time period, identifying the to-be-identified RFID tag, and sending a third request of a prohibition requirement to the identified RFID tag; and updating the random number identifier to be verified, and repeating the sending process of the second request and the third request until all the RFID tags in the detection range are identified. By predicting the number of the RFID tags and combining the binary characteristics and the exclusive-or operation of the RFID tags, the data of the non-adjacent collision bits are a