The deformation responses of cap rock of Underground Gas Storage(UGS)in Hutubi，Xinjiang were investigated during gas injection and production with the GPS data recorded by the deformation monitoring network which includs 13 observation sites. The time-series of three-dimensional deformation of the cap rock were obtained in the UGS operation process，and the deformation signals in different phases were identified by combining the GPS data with wellhead pressure data. The results show that the respiratory response of cap rock is obvious during gas injection and production of UGS，and surface deformation due to 1MPa change of wellhead pressure is horizontally 1.02mm in gas injection and 1.24mm in gas production，and vertically －1.11mm in gas injection and 0.86mm in gas production.