The invention discloses a NB-IoT-based intelligent streetlight controller, comprising a controller. The controller is internally provided with a CPU (central processing unit) control module, a connection end of the CPU control module is provided with a signal processing module, a power supply module and an SD (secure digital) card automatic identification module, wherein the signal processing module is used for collecting the information of voltage and electric current faults, the power supply module is used for supplying power for system voltage, the SD memory card automatic identification module is used for setting a system parameter, and the connection end of the CPU control module is provided with a NB-IoT module, a memory module and a relay. According to the NB-IoT-based intelligent streetlight controller, the NB-IoT internet of things technology is adopted to manage a city illuminating system and realize intelligent management, long-distance centralized management, surveillance and control can be carried out on the streetlights in a whole city, the streetlights in any road segments can be monitored for 24 hours everyday at any work stations on the internet, and various real-time data and state of the streetlights in any road segments can be inquired in real time through a historical data inquiry module.