Creation underground dam is practical cure for the best using of water sources and true management ground water. Than important problems and considerable for this dams determining inclined areas for Creation. And lack careful studies for elected Creation site to cause underground dam no efficient best. Therefore on this studied has been determine suitable locations to for construction of subsurface dams based on the Ardestan in the north eastern part of Isfahan by using some criteria decision and Geographic Information System. In this regard by consider geological engineering criteria, effective factor on the determining suitable case defined for construction of subsurface dams. At this time on the basis some criteria decision technique and by using Analytical Hierarchy (AHP) method problem on the basis necessary and effective criteria to be divided small parts and different levels and careful by the expertise judge, calculated importance degree (weight) for any level. Then at the regard to raise analytical care, velocity and easily calculated weights prepared for any index classes on the vector layer of the above criteria to be recorded on the Arc GIS, 9.3 environment and cases than most ratio has been determined. The Researches by this method, suitable alternatives in the slopes and alluvial fans of adjacent mountains in the western and north eastern part of Ardestan 1/100000 sheet in order to construct the subsurface dam.