Information of underground water level, water temperature and so on by seismic monitoring well provide basic data for earthquake prediction and scientific research. The data collection of water temperature and water level in Zhaogezhuang, Pinggu area, Beijing city during 2002-2014 is affected by rainfall and underground water exploitation, which disturbs the earthquake prediction of the observation data. In order to eliminate the disturbing factors, the data of seismic monitoring well in Zhaogezhuang was analyzed, the abnormity of the data was found out and the well improvement plan was put forward.