Abstract: The temperature observation survey of ten digital water temperature wells and six underground temperature wells in Qinghai is introduced. It has found: middle-term anomalies in two wells in Ledu and Minhe, short-term anomalies in three wells in Xining, Ledu and Delingha; the anomaly areas were mainly along the Xining-Minhe fault line, two wells in the region worked with no anomalis, which might result from the long distance between the probe and the end of the pipe line. The authors believe the middle-term and short-term anomalies might be related with the procedure of earthquake preparation.