Abstract: Utilizing lidar to obtain the wind velocity along the line of sight by Doppler shift, then inverting these velocity vectors to real atmosphere wind group speed is a very important purpose of lidar. In this paper, we will describe the technique which utilize conical scanning known as velocity azimuth display based on single LDV system. The horizontal and vertical wind sect of the observed field can be gained by spatial analytic geometry’s operation and analysis on the four orthogonal points on the scanning cone’s vertical section.