Abstract: Taking the ground source heat pump engineering project in Wuhan as an example,the thermal response tests were carried out of double U type vertical buried pipe using two methods for analysis and comparison,which were constant heatflux method and constant temperature method separately.There were two boreholes(R1、R2).R1 was tested by the constant heat-flux method,and the heat fluxes are 6 kW and 3 kW.R2 was tested by the constant temperature method,and the inlet temperature are 30℃ and 35℃.We discussed and analyzed the result of the tests based on introducing the geological condition of the project、the principle and design of the test.Combined with the hydro-geological conditions and drillability of rock and soil,we analyzed the suitability of vertical buried pipe ground-source heat pump system in this area and the study could provide useful references for the optimum design.