It is difficult to implement the device integration and linkage control in the safeguard control system. In order to do that, this paper proposes a method based on the ontology to integrate devices. A framework for the next generation intelligent control platform of the safeguard system is developed. A core business model is designed for the linkage system in the framework. In this framework, the ontology is used to describe the relationship among the device, the event and the command. A mapping file for the device, the event and the linkage action is build to deal with the linkage strategy. A signal receiver with a multi-queue buffer is provided in the event response model and this technology can handle the incident response of the linkage device. The corresponding algorithms are proposed in the paper. The system solves the unified access to heterogeneous systems (equipment) efficiently. Experimental results show that the entire system architecture has a good maintainability, and a high reliability in the real-time signal processing.