According to the technical control requirements of a group of twenty-four sterilizing boiler, this paper puts forward a DCS monitoring system for sterilizing equipments based on S7-200 PLC, and introduces the hardware configuration in detail and the software design of the system. 根据24台杀菌锅群的工艺控制要求,提出了一种基于S7-200PLC架构的DCS杀菌监控系统。详细介绍了系统的硬件组成和软件设计。