NetCDF orients data array with features of self description, high reading and writing efficiency and high availability， it is widely used for the exchange of weather radar data or meteorological satellite data. Weather radar developed by different manufacturers has different head information and base data storage formats of different type weather radar. Therefore, a unified coding is needed for easy data exchange without loss the special information relevant to the radar and the manufacture. The data model of NetCDF as well as its application to weather radar data storage is introduced. NetCDF format encoding and decoding experiments for Xband phased array radar, Wband cloud radar, Xband weather radar, and Kaband cloud radar are carried out on Visual C++ Platform. The results show: (1) NetCDF code has advantages in the unified coding of domestic new weather radar and conventional weather radar, which can code radar data with a unified code while reserving its inherent differences.(2) NetCDF codes radar base data by coding the information of dimension, variables, attributes and data based on the structure of radar radial data, forming a selfdescriptive NC file. Users can easily achieve “automatic” decoding with the help of library functions. (3) The size difference between original radar base data and radar base data coding by NetCDF is small, and the magnitude of the difference has nothing to do with the original file size.