IoT device integration is a key technology to realize multi-source IoT device interconnection, data interoperability and intelligent linkage through a unified platform. The system architecture usually contains device layer, communication layer, platform layer and application layer: the device layer needs to be compatible with different vendors' sensors, controllers and other heterogeneous hardware, Modern IoT platforms are more integrated with AI capabilities to achieve equipment anomaly prediction and adaptive optimization, and promote the deep integration of the physical world and digital systems.