″973″key project--China Heavy Rain Experiment and Study (CHeRES) used dual-Doppler radar to measure the heavy rain in the middle and lower reaches of Changjiang River in 2001,it is the very important to retrieve the three-dimensional wind fields using the radar volume scan data. A software system is developed that can retrieve the three-dimensional wind fields from the data measured by multiple-Doppler radar synchronously. The three-dimensional wind fields of a meso-β heavy rain measured by dual-Doppler radar on July 13th 2001 are retrieved and analyzed by using this software system. The results show that the wind field structure is resonable,and the system can meet the requirements of the experiment.