The Purpose of this research is to explain the capability of the AHP& GIS integrated model in determining of the old neighborhoods which have been priotrized for development in Pachnar neighborhood in city center of Mashhad. Studies related to this mater show that many works have down on AHP in engineering affaire(Saaty ,1977;saaty& vargas,1991 ,)but the only work which has been done into integrated APH & GIS is the work of Marinoni, he developed this extetnion -ext-ahp . This extension is the basic point of this research, but for reaching to the above purpose, at first conceptual model was defined then physical and socio-economic characters of 1097 plots of pachnear neighborhood in city center of Mashhad with 31 hectare area were collected. Based on Saaty preference table, 5 variables (material of building, land use, plot area, decay and street width) were selected into pachnar map layers, then these vector layers converted into raster one . Also consistency index calculated (CI=0.013), after this stage the background for doing the final stage was prepared. Finally, preference activities for specifying developmental potential areas have been done and the performance resulted to three categories: 1- the most important area, 2- more important are and 3- less important area.

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