论述了声发射技术应用于旋转机械故障监测与诊断是一种高效实用的方法。针对旋转机械结构特征及其声发射信号特点，开发了以声发射技术为核心的旋转机械故障监测与诊断专用系统，介绍了该系统的组成模块及其功能实现。在模拟工况条件下，利用该系统的时频分析功能和包络分析功能对一批故障滚动轴承进行了实时诊断，证明了该系统的科学性、有效性和实用性。

The present states of condition monitoring and fault diagnosis of rotating machines are introduced, and it is found that AE technique is a very valid means applied on rotating machines fault monitoring and diagnosis. Based on the structure features and AE signal characteristics of rotating machines, the paper puts forward a specific fault monitoring and diagnosis system applied on rotating machines of which AE technique is the core. The components and functions achieving of the system are introduced in detail. Under imitating operating conditions, real-time diagnosis of some faulty rolling element bearings have been carried on, using the temporal and spectral analysis function and envelopment analysis function of the system, thus the reasonableness, usefulness and validity of the system are proved.