The utility model discloses a three -dimensional observation system is warp to geology, including arranging the positive and negative two -way inertial sensing detecting system of buried three -dimensional in to and arrange GNSS observation station and information collection system on the ground in. Three -dimensional positive and negative two -way inertial sensing detecting system includes end to end, arranges a plurality of MEMS sensors in the PVC straight tube in along PVC straight tube axis, and in drilling was arranged in to the PVC straight tube, filled cement slurry in drilling and the PVC straight tube and cement slurry solidifies. The MEMS sensor is including respectively at a pair of inertial sensor of X, Y, the epaxial positive and negative two -way setting of Z. GNSS arranges the observation station drilling drill way department and coaxial with the PVC straight tube in. The utility model provides a had fixed inclinometer system to appear indivedual monitoring points lead to the problem of monitoring results distortion unusually, ensured that monitoring results more is close the physically qualitative change shape condition.