Label inventory method and device based on RFID system

The invention discloses a label checking method and device based on an RFID system, and the method comprises the steps: checking labels through at least two external antennas according to a checking rule after a checking instruction is detected; generating a current inventory result based on the inventory information of the inventory tags, wherein the inventory information of each tag comprises atag identifier, an antenna identifier, frequency, power, an RSSI value and inventory time; determining a suspected missing label identifier based on the label identifier included in the current inventory result and the label identifier included in the previous inventory result; obtaining selected inventory information corresponding to the suspected missing tag identifier from the historical inventory result and the current inventory result; and checking the label again based on the selected checking information through the external antenna corresponding to the antenna identifier included in the selected checking infor