POWERMAX ultrasonic water meter adopts ultrasonic flow measurement technology, and the water meter has a built-in NB-IoT or LoRa or LoRaWAN wireless meter reading module. The water meter is small in volume, low in pressure loss, and high in stability, and can be installed at multiple angles without affecting the measurement of the water meter. The whole meter has an IP68 protection level, can be immersed in water for a long time, without any mechanical moving parts, has no wear, and long service life. It is a long communication distance and low power consumption. Users can manage and maintain water meters remotely through the data management platform.