The geothermal resources in Fujian Province are mainly hydrothermal systems of medium—low temperature. However,there are still some deficiencies in understanding of the heat control process and conditions in the middle and deep crust of this area.Methods: In this paper,the gravity survey method and wide-field electromagnetic method were used to interpret faults and sag area in Guanqiao area of Quanzhou.Results:The study area is located in the gravity cascade zone and its southeast side is a steep region of uplift.The gravity anomaly values are mainly negative,with an increasing trend from northwest to southeast. The range of values is -52.1~ -37.5×10-5m/s2.The areas with high residual gravity and low residual gravity are distributed in an irregular band of NW and EW direction,and a few of them are NE direction.In addition,the Quaternary and fracture zones in the area have obvious characteristics of low resistance,followed by Nanyuan Formation.Granite as a whole is characterized by high resistivity,but the resistivity of intrusive rocks in early Yanshan is lower than that of late intrusive rocks.Conclusions:According to gravity and wide-field electromagnetic characteristics,we deduced 5 main faults and 10 secondary faults,and delimited the distribution range of sag area.Based on a detailed analysis of the heat control process and conditions,the geothermal resources in Guanqiao Area of Quanzhou should have three conditions: Heat-reserving rock, heat conductivity fault and heat retaining cover,which is a ternary heat accumulation model.According to the heat accumulation model,the intersection of the main faults F31 and F8 can be delineated as the primary target area of geothermal exploration,and the intersection of the faults (GQ-F2,GQ-F3 and GQ-F4;GQ-F7 and F29;F1 and F30;GQ-F10 and GQ-F11) can be delineated as the secondary target area of geothermal exploration. The DR02 borehole located in the primary target area of geothermal exploration shows that the water temperature increases from fast to slow at 0~300m depth,and the temperature stays at 48℃ below 300m depth.Geothermal boreholes tested the reliability of the heat accumulation model and the target area,which is of great significance to the exploitation and utilization of geothermal resources in Guanqiao area of Quanzhou.