Problem on visualization of expert system reasoning processes is put forward on the base of introducing visu alization basic concept and ICON system nonnal form, and a kind of knowledge base system model with visualisd char acter.

• 该文在介绍可视化基本概念及icon系统形式化规范基础上，提出了专家系统推理过程可视化问题，并给出了一个具有可视特性的知识库系统的一般模型。