Abstract: Dezhou City is one of the earliest areas for the development and utilization of geothermal resources in China. After years of large-scale continuous development, whether it has caused geological environmental problems such as resource depletion, water quality deterioration and reservoir temperature decline has always been the focus of social attention. In this paper, the long sequence monitoring data of Guantao Formation, Dongying Formation and Cambrian-Ordovician reservoir development and utilization history and current situation, water level, water quantity, water quality, water temperature and reservoir temperature in the process of geothermal development in Dezhou City since 1997 are systematically collected. Based on the spatiotemporal variation of the key characteristics of the geothermal reservoir, the dynamic evolution characteristics of reservoir are analyzed and summarized. The results show that the large-scale development before recharge has caused a rapid decline in geothermal water level. With the continuous increase of recharge work, the downward trend of water level in most development wells has slowed down, and even some geothermal wells have rebounded； Years of exploitation and recharge have not had a great impact on water quality, and the main ion content of geothermal water is basically stable； The wellhead water temperature of the development well has not changed due to years of development; With the increase of the recharge year, the vertical variation of the reservoir section of the recharge well is getting smaller and smaller, and the temperature recovery rate is getting slower and slower. Under the condition of large-scale recharge, the phenomenon of 'cold accumulation' in recharge wells should be the focus of attention.