In order to solve the problems of traditional fire hydrant's remote real-time monitoring and inconvenient management, an intelligent fire hydrant monitoring system based on NB-iot was designed. The system is based on FM33G048 domestic low power embedded chip as the main controller, low power sensor PCM300D as the sensing layer, and the solar panel with rechargeable lithium battery for power supply. The transport layer transmits the data obtained by the awareness layer to the EMQ server. Finally, by transferring data to MySQL and displaying it on the Web, the application layer can on the one hand view the reported data in real time and on the other hand predict and analyze the historical data in the database, reducing the lag caused by fire equipment maintenance. Experimental results show that the system can be accurate and effective monitoring of the fire hydrant water pressure and position, ultra low power design with solar panels, which can effectively improve the battery life, managers can through a remote terminal to a fire hydrant monitoring, when the water pressure is not set or by normal threshold prediction algorithm to predict the future water pressure anomalies will send alarm messages to remind management maintenance; The system is stable, reliable, low power consumption, easy to maintain and manage, and can effectively promote the development of intelligent fire protection.