Abstract: Based on the 2008-2023 observation data of water level and water temperature in Fapa well, we analyzed the characteristics of dynamic change of observation data, pattern of earth tide, co-seismic response and earthquake precursor anomaly. The results show that the water level of Fapa well has a clear pattern of earth tides, and the annual variation is obvious highness in summer and lowness in winter. The annual variation of water temperature was less than 0.01℃, showing a trend stable type. The co-seismic response of well water level and water temperature is obvious, the co-seismic response ratio of M_S≥6.0 earthquakes is 78.6% in the study area. The well water level and water temperature can record some obvious precursory anomaly, mainly characterized by short-term anomalies in time, near and local earthquakes in space. we systematically studied, scleaned and analyzed the fluid observation data of Fapa well, it is found that the aquifer of Fapa well has good elasticity. The observation data of Faba well can well reflect the information of underground stress and strain change, so it is an ideal fluid observation well. It can provide useful information for earthquake prediction.