Large mechanical and electrical equipment has become increasingly widely use. This large mechanical and electrical equipment itself is not only expensive, its maintenance cost is also quite striking. Equipment damage, deterioration of accuracy and reduction of efficiency may cause huge losses. To effectively guarantee the normal work of the equipment, the processing quality and fault forecast, remote online detection and intelligent fault diagnosis system platform is built. The remote monitoring system integrates sensor technology, dynamic measurement and control technology, signal processing technology, fault pattern recognition and artificial intelligence technology. The field application shows that the system can effectively monitor the running status of the fan, achieve the real time alarm and running trend prediction effectively.