Coal mined-out area will cause great threaten to the buildings and structures within the scope of Grade Ⅱ Dam Pumping Station. By laying deformation monitoring network in the GradeⅡ Dam Pumping Station scope, using advanced technology and high precision measurement method, regular observation, analysis and comparison of the monitoring points have been carried out. It can timely monitor and forecast the modification information. In this paper, in accordance with regulatory requirements, and application of GPS static observation, traverse, precision leveling technology, the deformation monitoring network has been laid, and the first observation has been carrie out. It will provide an important basis for future deformation monitoring.