With the rapid expansion of cloud technology, for the irregular area monitoring equipment distribution is uneven, there are monitoring blind areas, resulting in difficult information collection, investigation and tracking, and security risks, the use of alert system can find out the monitoring blind areas in irregular areas, can achieve the rapid alarm of the people to the sudden or emergency situation, and the system will use cloud technology to build a local area network to search for all the nearby cameras to turn angle face of the area for video surveillance and video recording. In this paper, through literature method, analysis method and system method, we retrieve the data of the existing surveillance equipment in the irregular area, select more mature and practical hardware and software, distribute terminal equipment evenly in the irregular area, use infrared technology to reasonably detect the surveillance blind zone, and design the surveillance blind zone alert system. The system provides a detailed description of how to design the system in accordance with the overall design of the surveillance blind zone alert system, the hardware design of the alert system, the software design of the alert system, and the application prospect of the alert system, providing a theoretical basis and application scope for the next development of the surveillance blind zone alert system.