Analysing the data of the total atmosphere temperature,it is discovered that anomalous increase of atmosphere temperature a few days before the Zhangbei M_S6.2 earthquake on Jan.10,1998 in epicentral region and its surrounding areas is a kind of impending earthquake precursor.Space distribution of anomalies shows that epicentre of the earthquake is in strong anomaly area which is surrounded by weak anomaly area;the earthquake may be caused by extension of Zhangjiakou -Beijing -Penglai fault of NW towards the west and related to activity of Shangyi -Duolun NE fault etc.at the same time.Development of the total temperature isopleths reflects summarily the process of the accumulation,the expansion and the release of strain.