讨论了利用人工智能技术来实现生产过程故障检测与诊断的原理。以液位控制系统为例，说明了“基于规则”和“规则架＋ 规则体”两种方法建立专家系统的过程及知识表达的思路 The principle of using artificial intelligence technology to detect and diagnose faults in production process is discussed. Taking the liquid level control system as an example, this paper explains the process of establishing expert system based on two methods of “rule-based” and “rule-frame + rule body”