Abstarct: Meshkin Shahr geothermal field is located at 16 Km distance to south of Meshkin Shahr and northwest of Sabalan mountains in a place called Moil valley. Hot spring and fumarole of Sabalan Mountain can be found in cross-section of faults and fractures in hydrothermal system. In this research, for introducing a novel conceptual model of hydrothermal system in the area, obtained results of geophysical data (i.e. Magnetotelluric data) was combined with hydro-geochemical investigation, well drilling data and geological studies. Geological studies were conducted for evaluating the lithological and geotechnical features of the area. In this regard, lithological units and associated faults of the study area were identified. In hydro-geochemical investigation for determination of types and source of springs, many different graphs including Piper graph, Stiff graph, rectangular cationic and anionic graphs, and water mixture graphs were used. Regarding to these studies, associated tips of most springs have been identified as Chloro-Sulphate springs. baxsed on the 1D and 2D modeling applied on the geophysical data, thickness, perimeter of reservoir and direction of flow were determined approximately. In addition, well drilling information, lithological variation and severity of mineral alteration in diverse depths, enable us to identify the variation of temperature, amounts of drilling fluid leak and permeability of laxyers. According to all of these exxpressions, location of area with up-flow zone was specified under the Sabalan Mountain. Moreover, the direction of fluid flow is from east of valley to west of it. Thickness of reservoir in this area varies between 1000m to 2000m. The rock type of main zone of reservoir is Monzonite which is located at the depth of 1600m.