As the meteorological data continuously grows, the needs to further improve the data management and service capacity of CIMISS (China Integrated Meteorological Information Sharing System) has become increasingly urgent. The storage system of CIMISS has some problems, such as insufficient dynamic expansion ability, poor parallel computing ability and low data throughput. To solve these problems that restrict the development of CIMISS, a group of distributed file systems and a distributed database system are established. Combining with NAS (Network Attached Storage) technology, the distributed file system replaces GPFS (General Parallel File System) and sets up shared file systems to store the unstructured meteorological data. The distributed database system replaces Oracle RAC and sets up an RDBMS (Relational Database Management System) to store the structured meteorological data and index meteorological data files. The practice has proved that the proposed scheme can effectively improve the data storage capacity and concurrent response ability of CIMISS to meet the needs of meteorological operations for data storage and application in the future.