In order to adapt to the wireless and intelligent trend of battery monitoring system, and solve the real-time monitoring problem of starting batteries, small equipment batteries and other relatively scattered batteries, the paper will integrate low-power single-chip microcomputer, A/D acquisition module and RFID communication module. The monitoring circuit board of the low-frequency wake-up module is packaged on the battery. Based on the concept of the car PKE keyless system, a low-power wireless battery monitoring system based on STM32 single-chip microcomputer is designed. The system utilizes RFID technology to avoid contact, remote and batch read battery status information, and draws on the advantages of the car PKE keyless system, relying on the STM32L151 low-power single-chip microcomputer to realize the intelligent and efficient management of the scattered distribution battery.