In order to realize the monitoring of power cables, an image monitoring system based on STM32 microprocessor and GPRS wireless communication module is studied. The system is based on the Cortex-M4 as the core STM32F407 as the main control module, the use of intelligent spherical web camera for image acquisition, and use the network port to communicate the camera to capture the image into the STM32F407 development board for processing and preservation, and through GPRS wireless communication module sent to the host computer or user phone. The experimental results show that the image transmission is stable and reliable, the image is clear, and the requirement of detecting the power cable can be achieved.