It can save the time for customers to take things, thus improving the utilization rate; At the same time, it simplifies the customer's picking operation, greatly facilitates the customer's high recognition rate, is fast and accurate, and the recognition rate of the erased barcode can still reach 100%. Barcodes are used as vouchers to improve the confidentiality of vouchers. There will be a digital code under the bar code paper, which is convenient for comparison and recording; At the same time, after the bar code pattern is artificially destroyed, it can still be accessed by inputting its code through the keyboard. It can fully display its superior performance when the passenger flow is large. Bar code lockers can print out the names of units and places, which can improve the image of units and avoid unnecessary disputes caused by confusing code bars. In the case of power failure or large fluctuation of grid voltage, the machine can automatically switch on the standby power supply or adjust the power supply. After power failure, the standby power supply can work normally for not less than 4 hours.