Abstract: There are many characteristics in 3D laser technology，such as rapid，non-contact，real-time，dynamic，initiative，high-density，high-precision，digital，automation，and so on，so it can be applied in the surface and underground surveying of open-pit.Based on the data of 3D laser scanner，a high accuracy 3D model is set up to provide the information for the mine design，mine production and dynamic data management.In addition，3D laser scan technology can be used to the underground tunnel survey with tunnel models created rapidly.Its spatial relations among tunnels are obtained through the model，providing the comprehensive and high-precision spatial data for digital mine.Lastly，the method for improving the accuracy and the principle of coordinate correction are presented.

Key words: Laser scanning technique, Output of ores, Point cloud, Coordinate correction, Surface model, Tunnel survey