本文给出了一个适用于多微机系统,计算机网络等自诊断的通用算法,其算法复杂性为O(|V|×|A|)。该算法简单、有效,便于在微机上实现。最后还简略地介绍了一个在微机APPLEⅡ上实现的诊断系统SYSTDIAG。该诊断系统不仅实现了文中所介绍的诊断算法,还具有系统可诊断性的测定功能以及其它一些功能。 This paper presents a general algorithm which is suitable for self-diagnosis such as multi-computer system and computer network. Its algorithm complexity is O (| V | × | A |). The algorithm is simple, effective, easy to implement on the computer. Finally, a brief introduction of a diagnostic system SYSTDIAG implemented in microcomputer APPLE Ⅱ. The diagnostic system not only implements the diagnostic algorithm described in the article, but also has a system diagnostic capability of measurement and other functions.