Distribution network management and control method and system

The invention discloses a distribution network management and control method and system, and the method comprises the steps: obtaining an original pipe diameter size signal of a to-be-detected pipeline in a distribution network through an ultrasonic sensor module, and transmitting the original pipe diameter size signal to a signal processing module; analyzing and processing the received original pipe diameter size signal through the signal processing module to obtain a quantifiable digital signal, and transmitting the quantifiable digital signal to a wireless communication module; analyzing and processing the received quantifiable digital signal through the wireless communication module to obtain a target pipe diameter size parameter value, and transmitting the target pipe diameter size parameter value to an alarm module; and performing alarm control based on the received target pipe diameter size parameter value through the alarm module. According to the technical scheme of the embodiment of the invention, w