In order to enhance the capacity of data inversion in the electrical method and to find out a better inversion method, we have introduced and developed the Box-Kanemasu method successfully in this paper in addition to studying the application of the modified damping least-square method in a two-dimensional inversion. We have compiled the computer program to be used on two-dimensional data interpretation in electrical prospecting. The results from inverting artificial and field data have proved that the theory is correct and the approach is a good practice.