With the rapid growth of meteorological data in Tianjin, CIMISS has insufficient storage and management for the mass data and its query efficiency is low in long-time-series data accessing. Therefore, based on the distributed storage technology and WebGIS technology, we design the Tianjin Integrated Meteorological Information Management and Sharing System. This system realizes intensive management, comprehensive display, unified service of Tianjin characteristic observation data, prediction products, intelligent prediction and shared data, it improves the access performance of Tianjin meteorological big data. This paper describes the design idea, data flow, key technology, main function and application of the system in detail.