The invention discloses an observation station choosing method based on a ground three-dimensional laser scanning technology. The observation station simulation choosing technology that is realized indoors through a computer is proposed by the observation station choosing method, wherein the observation station choosing method comprises the steps of obtaining fundamental topographic digital data of a measured region; performing gird discretization on the fundamental topographic digital data; simulating and analyzing the visible region of a certain observation station, and displaying the result by grid graphics; seeking a feasible laying scheme; and seeking an optimized laying scheme by comparing multiple observation station laying schemes. The observation station choosing method achieves the purposes of reducing the repeated scanning, saving wild operation time and improving working efficiency to the greatest extent on condition that the number of the set observation stations is the minimum and the complete measurement is ensured without missing measurement.