With the development of IoT, RFID technology has become a core enabler for ubiquitous sensing. Traditional fire protection systems suffer from information silos, delayed responses, and inaccurate positioning. Passive IoT and integrated communication-sensing technologies address these issues by enabling cost-effective, power-free, and multi-dimensional sensing via RFID tags (e.g., monitoring equipment status, channel blockages). However, unreliable channels and unknown tag interference hinder data reliability. This paper proposes a layered cross-system platform fusing RFID, WSN, and advanced algorithms to integrate multi-source data. It enhances sensing robustness and realizes intelligent functions like risk early warning, resource scheduling, and dynamic evacuation routing, boosting fire safety intelligence and emergency response efficiency.