Abstract: In order to study the stress condition of the underground area at Silin power station,Guizhou Province,which will be constructed,the geostress measurements by acoustic emission(AE) and stress relief methods are carried out here.The results show that the magnitude of maximum principal stress by AE is 15.9MPa,and the direction of the maximum principal stress is NE 70.9° and its magnitude 16.03 MPa by overcoring,suggesting that at the same position the results obtained by two methods are very similar and believable.