According to the boundaries of uplifts and sags, tectonic fault zones and the range of geothermal anomalies of tertiary and fourth tectonic units, geothermal area in northwestern Shandong province is divided into several geothermal fields. On the basis of thermal storage depth and thickness, hydrochemical types, water volume and water temperature of Guantao and Dongying formations in northern Shandong province, along with local geothermal planning, development and utilization and administrative boundaries, this study further classified the geothermal field in Northwest Shandong province into five geothermal blocks. Based on drilling data and regional geothermal geological data of the geothermal field in the Dongying depression, as well as previous research results of recent exploration projects, this study analyzed the characteristics of burial conditions, supplementary and drainage conditions, geothermal field and hydrogeochemical characteristics of the Dongying geothermal field. The results reveal that the geothermal field in the Dongying depression hosts abundant medium and lowtemperature geothermal resources. Thermal fluid is confined pore water of clastic rocks with high salinity and high mineralization degree, and results mainly from infiltration and recharge of atmospheric precipitation in surrounding mountainous areas. This paper establishes a conceptual model of geothermal field formation mechanism, which provides an important basis for the rational development and utilization of geothermal resources.