The data of water surface temperature before and after Wenchuan MS8.0earthquake in 2008from 73wells in the range of 800km from the epicenter are analyzed.According to the given judgment basis for anomaly and indeterminate anomaly,among the all observasing wells,9wells had seismic precursor anomalies,5wells had anomalies but can not be determined to have relation with the earthquake,3wells had typical＂no-anomalous change＂ and others had no anomaly.It is considered that there are three periods in the anomalous appearance,which are early period with slow change,middle period with sudden change and late period with going down change.Meanwhile the dynamic change characteristics of water level,gas radon and other fluid measure items in the same wells,as well as some deformation items（strain in drill hole,tilt in drill hole,strain in tunnel body etc.）in the same stations or nearby stations（≤50km）are compared with the change of water surface temperature.It is found that crustal deformation anomaly is interrelationed with the late period of anomaly in water surface temperature,but anomaly of water level has nearly not relation with the temperature in same wells.