Abstract: The social and economic development of Pingyuan County in Shandong Province is rapid, but there are problems such as tightening resources and environmental constraints, ecosystem degradation, serious environmental pollution, and frequent occurrence of extreme weather such as smog, highlighting the seriousness of energy conservation and emission reduction. In order to ensure the necessary energy supply for urban and rural development, the authors in this paper carried out supplementary investigation of the reasearch area, based on the existing geothermal resource development data in the reasearch area. The relevant hydrogeological parameters were obtained through drilling and testing, and the geothermal resources in the reasearch area were calculated by using the geothermal calculator software. Besides, the well spacing was optimized according to the relationship between the well spacing and the temperature, water level, economic cost of the wells. The results show that the distance between thermal storage and irrigation wells in the reasearch area is set to be 400 m, which can make sure the environment is not affected. This research is beneficial to the sustainable development and utilization of geothermal resources.