Abstract: Three key development stages of Shenzhen precise and intelligent forecasting service system are analyzed in this paper.The Shenzhen mode is characterized by precision, high efficiency, wide coverage and excellent experience. Four innovations of the mode are revealed in this paper. First, technological innovation functions as the motive force for the development of precise and intelligent forecasting service system. Second, the “Internet Plus” meteorological service mode becomes the benchmark for the fine forecast service of megacities. Third, the full coverage of early warning information in the city and the targeted release with high-precision are realized. Fourth, a new coordinated disaster prevention mechanism of four administrative levels (citydistrict-street-community) for meteorological disasters is established. Six development prospects of the precise and intelligent forecasting system are analyzed: building a comprehensive perception system covering all systems, building a multi-dimensional and multi-type data management framework based on big data, developing an intelligent forecasting brain based on big data, developing impact-based disaster forecasting and risk early warning system, building an integrated and intelligent operational management platform for integrated forecasting, and developing land-sea integrated impact-based meteorological disaster early warning and forecasting service system.