Ultrasonic water meter upgrading method, system and device supporting infrared function

The invention relates to an ultrasonic water meter upgrading method, system and device supporting an infrared function, and is applied to the technical field of water meter upgrading, the method is applied to an upper computer end, and the method comprises the steps that an upgrading data packet, an upgrading secret key and an unpacking byte length are obtained; splitting the upgrading data packet into a plurality of upgrading program packets according to the unpacking byte length; a secret key verification instruction is generated based on the upgrading secret key, the secret key verification instruction is sent to the ultrasonic water meter end to be verified, a verification result sent by the ultrasonic water meter end is received, and the verification result comprises verification success and verification failure; when the verification result shows that verification fails, judging that upgrading fails; and when the verification result is successful verification, carrying out upgrading operation based on t