The non-geodynamic signals such as atmosphere, ocean bottom pressure and hydrology, contribute significantly to the geodetic and site observations of gravity changes and vertical displacement.These geophysical contributions must be provided consistently for the purpose of correction on both observed geodetic and site time series.In this paper, the geophysical contributions on both surface gravity changes and vertical displacement,are studied at collocated Jiufeng station of China during 2001 to 2005 ,using geodetic technique GPS, and using independent surface observations such as super-conducting gravimeter (SG) and absolute gravimeter (AG).The annual geophysical contributions on gravity and on vertical displacement fairly agree with the observed SG gravity and GPS height changes by first removal of concrete pillar and bedrock thermal expansion effects, respectively.The results indicate that when consider the hydrological contribution, the geophysical model can successfully explains both the annual gravity changes and vertical displacement at Jiufeng station.