In recent years, Global Positioning System vigorous development, observation of the system is simple and rapid, and the time, place and weather is unaffected, to provide users obtain all-weather, real-time location and time information; Based on the above advantages, GPS make use of geological research has become so convenient, and slowly become a tool to confer the become deformed of the crust and terrain dynamics. Emitted by the GPS satellite carrier phase and electrical code signal received at different locations at the same time can be accurate set the relative position of each station. Taiwan lie in the rainy season and typhoon season from May to August yearly, will bring abundant rainfall during this period. The surface of the earth is rich in water, its weight therefore increase, making the pore water pressure rises, cause the downgrade movement accelerated. TienChih area just be located at the slopes, whether because the factors that caused creep downward of the crust, to deserve our confer profoundly. Tag on to the continuous stations built in this area had a long history, the information obtained is quite sufficient. Therefore, this research employ observations data of the continuous stations received (December 2010 to February 2012), the GIPSY software developed at JPL, USA precision solver to help us better understand the crust of this region whether to occur of the phenomenon of creep. Observed by the calculation of creeping affect caused by the directional departure roughly south-easterly direction moving, and the slope in the terrain of the region identically, may be associated with the movement of the slope on the block or long-term architecture of the earth deformation related. Moreover, many factors affect the potential shift occurring, this study uses the calendar year rainfall to explore, and found that the precipitation amount does affect the creep distance, resulting in greater movement distance of the point in time usually occurs in July and September. Finally, the crust changes from 2004 to 2010 TienChih area of its earth deformation for the slow westward movement, but the shift in the landslide of great change in events, and the movement direction is east, and aspect.