Abstract: The significance of deformation monitoring at foundation of gravity dam was expounded, the application of non-buoy wire alignment for CFRP and its feasibility to use in slope sections were discussed, and horizontal displacement monitoring at gravity dams was extended. Further, monitoring of horizontal displacement inner earth-rockfill dam by serial rod displacement meter was advanced, and the possibility of construction of monitoring system with air laser alignment for horizontal displacement inner earth-rockfill dam was proved. As well, disadvantages in existed settlement monitoring systems were analysed. It is necessary to adopt water level settlement gauges and transom type settlement gauges in settlement monitoring systems for high face-slab rock-fill dams, and this combination is an important guarantee for construction quality of concrete face and safety operation.