The system belongs to the technical field of monitoring, and specifically relates to a key workshop monitoring system based on Internet of Things (IoT). The key workshop monitoring system based on IoT comprises: a key device monitoring unit, used for sending an operating status of a key device to a monitoring management server, receiving a control instruction delivered by the monitoring management server, and performing a corresponding action; and a closed-circuit television (CCTV), used for performing online monitoring of a workshop, and transmitting real-time video information to the monitoring management server. The key workshop monitoring system based on IoT can perform high-definition video surveillance inside, and at the entrance/exit, of a key workshop in real time, enabling video recording at various points for online or for later viewing, effectively ensuring that standard safety operations are performed on key devices and infrastructure equipment at a production site, effectively monitoring and mana
