Abstract: The weathering crevice water and the structure crevice water are main ground waters in Taishan group metamorphic rock. Because of the uneven weathering zone thickness, bad connectivity of the crevice water and limited store water space, the ground water of rich water area is seriously uneven. According to the rock property，structure and rock-fabric， there exists the crust of storage structure conditions such as weathering rock, fracture zone rock， dyke rock， coarse grained rock and so on. By finding the low resistance orthogonal point, the unimodal abnormal “V” shape low resistance, abnormal twist shape low resistance, unimodal abnormal curve of narrow width, unimodal abnormal curve of broad width and so on, in the field measures， seeking the ground water in the Taishan group metamorphic rock is very successful.