介绍一个指导转炉炼钢补吹操作的专家系统.着重介绍其知识库的组织结构及相应的推理算法.提出按知识结构分级的知识表示策略及按任务划分组织知识源的方法.建立二次映射求解模型.采用优化求解策略,进行机遇推理,并用手段-目标分析法,并加以启发及元知识指导.使产生式系统具有并行处理能力.从而使系统具有较强的领域适应性. This paper introduces an expert system to instruct BOF steelmaking operation, emphasizes on the organization structure of its knowledge base and the corresponding inference algorithms, puts forward the knowledge representation strategy based on knowledge structure and the method of organizing knowledge source by task. Solving the model.Using the optimization solution strategy to carry out the opportunity reasoning, and using means - target analysis, and inspired by the meta-knowledge to make the production system with parallel processing capabilities.Thus the system has strong field adaptability.