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In order to deal with the problem of equipments group prognostics and health management system, a layered PHM function model is put forward. Then, based on WEB Service and portlet, A PHM platform framework is established, a PHM portlet communication model is implemented based on subscribing / publishing method by message container. The data synchronization technology is studied in an inter-operation model based on XML. Further, the collaborating issue between different nodes is solved. Finally, a prototype of PHM software is developed to demonstrate the flexibility of above mentioned methods and technologies.