In order to improve the precision of laser spot position measurement, several key technologies are studied. Range-gated technology is studied to restrain laser backscattering caused by aerosol scattering. An asynchronous range-gated method based on four-quadrant detector is introduced. An improved blind deconvolution method used to process images afterwards is introduced, which serves to lower the impact of atmosphere turbulence on laser spot imaging. An image registration method based on objective area is introduced to eliminate the difference between visible camera and infrared camera. Recover the spot and find the laser spot position using Gauss surface fitting. The experimental results show that the precision of laser spot position is not more than 0.3 pixel.