Abstract: Based on KADS Principles, the process of building model-based intelligent process controlsystem MIPCS is divided into two stages, knowledge analysis and system implementation. The goal ofknowledge analysis stage is to build the conceptual model of MIPCS.During sysrem implementation phase,the specific-application-problem-oriented intelligent process control system MIPCS is constructed according tothe conceptual model. The conceptual model describes at knowledge level the knowledge of MIPCS possessand the strategy by which MIPCS organizes and utilizes the knowledge.The knowledge is represented asmodels which are organized in four-layer framework based on KADS methodology. All of these mentionedabove are described in this paper.