The NB IoT water meter relies on the NB IoT narrowband technology for data transmission, and the signal is stable and continuous. Its advantages are remote control, including remote data transmission, real-time monitoring, online recharge, regular meter reading, and no manual queuing for payment, which can effectively save costs related to meter reading and charging. This table has the function of intensive data freezing, which can be reported every minute, hour and day through the network of the NB IoT platform according to the actual situation of users, and 24 hours of data can be reported. The product has the function of emergency valve opening, which can be opened for a period of time by local operation of the water meter button at a non communication window. Physical key setting makes maintenance more convenient.