An important objective of electrical prospecting methods including tomography techniques, is to maximize, extract and enhance the response due to the target inhomogeneities using various surface and subsurface electrode arrays in boreholes, tunnels and other underground spaces. A future problem in improving the reliability is to measure voltages with more sensitivel to target inhomogeneities, or to design the effective resistivity array combinations and patterns cr to develop additional new tomography informations under more restricted field conditions based on practical geoelectrical method. Generally, the most effective subsurface visualization by electrical prospecting method has not been selected. This study has newly developed a subsurface visualization for surface electrode system by combination of the digital linear filter and the vector area methods, and a technique for subsurface electrode system by using the differential sensitivity distribution method. The evaluation of each effective subsurface visualization procedure has been discussed by using field data or the computer models.