Abstract: The characteristics and causes of water temperature distortion in Han 1 well and water level anomaly in Wang 3 well of fluid observation project in Tianjin area since 2020 are analyzed, and the anomaly prediction index of two wells is given. According to the water temperature distortion of Han1 well and water level anomaly of Wang3 well, the fluid science group predicted the time, place and intensity of future earthquakes to a certain extent, but the magnitude is still lower than that of Guye Ms5.1 earthquake. Compared with the anomalies occurred in Tianjin before the Wen'an Ms5.1 earthquake on July 4, 2006 in Hebei Province, although the number of anomalies is similar, the reliability of anomalies is low, and the empirical prediction can only increase the magnitude to Ms4.5. Before the Wen'an Ms5.1 earthquake, the high value of water mercury in Wang3 and wang4 wells provided us with some earthquake information of Ms5.1, but no similar situation was found in Guye Ms5.1 earthquake. At the same time, the increase of network observation items does not provide us with more abnormal information. This not only shows the limitation of the empirical prediction, but also shows the lack of the information detection ability of the network.