Abstract: Based on analyzing some drawbacks of existing online monitoring systems and the evolution trend of remote diagnosis systems, an architecture of the distributed remote diagnosis system was presented using CORBA specification. Some key technologies for implementing the remote diagnosis system were discussed such as POA strategies, Naming Service, Event Service, CORBA Component Model as well as Database Integrate. The fundamental function modules and implementation details of the diagnosis system for enterprise level and remote diagnosis centers were focus on. The most functions discussed have successfully used in industry.