In combination with airborn GPS real-time position parameter, a wind speed and direction calculating program is given with longitudinal and latitudinal starting points and destination ,thus an important base to real-time follow and the tracks of advection diffusion and position control in the seeding area is provided. It's more accurate than the way that time and space extension in the fixed-point and fixed-time wind speed and direction detected in neighbour area. In additation, the possible error in computing PMS particle concentration produced by wind speed and direction is given.