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In order to meet the needs of users for specialized, refined and personalized meteorological services, solve the release problem of crossplatform meteorological information and realize the automatic push of mobile terminal information, a meteorological crossplatform release system of specialized meteorological service is established with the aid of Enterprise WeChat of the Jiangmen Meteorological Public Service Center and the Sina cloud server SAE (Sina App Engine), adopting the PHP network programming language. The key technologies of the system are expounded：(1) the SAE and multiple application API of Enterprise WeChat are connected to achieve the unified management of multiple applications. (2) Access tokens based on the KVDB cache are established, which improves the efficiency of information publish. (3) Timed tasks and asynchronous execution of messages are used to realize the automatic release of the superthreshold messages and to reduce the blocking and delay while sending messages in groups. (4) Messages push mechanisms of different threshold conditions are used to realize the synchronous release of various kinds of meteorological products. To a certain extent, this system improves the capability of specialized meteorological service and had creates economic benefits for users.