Abstract: In order to optimize the detection effect of water-bearing capacity of lower strata in the mining area, based on the electric perspective method and high density electric method, combined with the spatial potential distribution theory of the whole electric field, an efficient and three-dimensional floor water detection system was proposed. The system takes the axial unipole-dipole method as the bottom device, the three-dimensional power supply combination as the power supply device, the multi-channel acquisition technology as the measuring device. The results show that using the water exploration system can greatly improve the mine geophysical exploration efficiency, accurately detect the water-bearing distribution of the rock stratum at any position and at any depth near the working face, divide the poor and water-rich area of the floor rock strata, and evaluate the safety of the working surface. It can realize the full area, no blind area and three-dimensional detection of water-bearing capacity on the bottom plate of the working face.