Abstract:Weather radar data is of large quantities and difficult to share. To a certain extent, it restricts the application of weather radar data across departments, systems, and platforms. From the data layer, service layer and presentation layer, it introduces the technical architecture of the water conservancy cloud shared storage platform, analyzes the technical features in data security, cross-platform transmission and user rights management as well, expounds the application of weather radar data sharing system in the weather radar application system of the second phase of the national flood control and drought command system from the aspects of system structure, function and data maintenance. It realizes sharing and exchange of weather radar data between the Ministry of Water Resources and various river basin organizations.