Recently, 3D modeling of geophysical data such as gravity and magnetic can be used to study areas with little geological evidence of the earth surface and can contribute to the process of exploration and optimal selection of mineralization potential areas. Inverse three-dimensional modeling using the Li-Oldenberg algorithm for each set of gravity and magnetic datasets can be guide to determine the shape and density/Susceptibility distribution of beneath the earth surface. Above mention procedures have been apply to study the Negin Area. There are appropriate matching between drilling and inversion results. The results of inverted modeling confirm the existence of an intrusive mass associated with mineralization at a depth of 60 meters, which is in acceptable agreement with the drilling data.