WIS (WMO Information System) is an integrated information system and developed for meeting the requirements of all WMO Programmes, affiliated international organization and programmes with respect to information exchange, management and access. Its main functional components are National Centres, Data Collection or Product Centres, and Global Information System Centres (GISC). As an important influential member of WMO, CMA’s goal is to serve as one of the GISCs which are core communication centers in WIS and responsible for collecting and distributing the information in their areas of responsibility, and exchanging the information meant for routine global dissemination with other GISCs. The paper gives an introduction to the functional architecture of WIS and the key technologies for implementing the services of metadata synchronization, data discovery and data synchronization, also presents their applications in the design and development of GISC Beijing.