It is difficult to establish a geothermal field for geothermal energy development in the central uplift belt of a graben basin. In this paper，the geothermal field is established through wellbore thermometry as well as SiO2，K-Mg，and NaK geothermometers to identify the controlling factors of its distribution and clarify its development model. The results show that Es2-Q in the central uplift belt of Dongying Sag can be divided into the surface variable temperature zone，the first thermal warming and thermal insulation zone，the second thermal warming and thermal insulation zone，the third thermal warming and thermal insulation zone. Geotemperature is calculated with SiO2，K-Mg，and Na-K geothermometers. Based on the geological research in stratigraphic correlation，structure，reservoirs and well logging in the study area，six sand formations are divided vertically and the geological model of the temperature field is established with the temperature measurements and laboratory data. It is found that the geothermal gradient is dominated by the plastic materials at the bottom of the central uplift belt，the patterns of main faults，lithology，stratigraphic horizon and thickness ratios of sand/mud. A geothermal system development model of the central uplift belt that consist with a thermal expansion zone，a high temperature fracture zone，a high temperature compact zone，a medium temperature compact zone，a medium temperature hot-water zone，a low temperature hot-water zone and a seal zone is introduced according to the geothermal genesis and development characteristics，temperature，and water yield.Besides，the genesis of geothermal system is analyzed from heat sources，cap rocks，thermal reservoirs，heat flow channels，and sealing.