Abstract: It is an incontestable conclusion that the Surveying Robot (Automatic Electronic Total Station) can monitor damdeformation automatically.But the stability of the base point belowthe Surveying Robot exert a tremendous influence to monitor precision. The Surveying Robot can not monitor the deformation point, when cover the surveying line with a body. For overcoming the above problem, the AMSDD- SRBG(Automatic Monitoring System of Dam Deformation by Surveying Robot Based GPS) system has been developed, which is integrated of the GPS technique with Surveying Robot. Using the AMSDD- SRBG system, the influence of the stability of the base point to monitor precision has been solved with simplified monitoring procedure and relative lower fixed investment cost of deformation monitoring. The structure and work principle of the AMSDD- SRBG system has been introduced in this paper. A monitoring example has been given. Based on the field self- inspection data , the basic warning principles of dams has been given.