Abstract: The study area,an old continent block with a Coledoman folding basement,is located 20-31.5°N,115-122°E,along the southeastern edge of the Eurasian plate.Granite and volcanic rocks are widespread throughout this area with an age decreasing from west to east.The Yanshanian granite exists mainly along the coast and the tectonic activity also shows an increase to the coast.For the coastal area the geothermal gradient and the geotemperature show a higher value ranging from 50-70℃ at a depth of 1000m and 2000m,respectively,and the highest up to 60℃ and 90℃,somtimes even to 100℃and 130℃.Presented here are some data from the Wuyi Mountains,the Moyang Basin and the Jinqu Basin and the like.Distributions and formation of the geothermal field are dependent on deep structures in the earth's crust and the regional geotemperature,on the crustal thickness as well as on the geological structures.The occurrence and distribution of the hot springs are correlated with two major deep faults striking NE and NW.In addition the content of radioactive elements in the Yanshenian granite is about two times higher than that of the contemporaneous granite found in North China.Two types of geothermal field may be distinguished in the study area:1) conduction and 2) conduction superposed by hot water conduction.