In this paper,the space-time structure of shallow-layer ground temperature anomaly and the hor-izontal structure of precipitation anomaly before,during and after the origin month of the Dongchuan earthquake in l966 are analysed. The analysis indicated that the positive anomaly of ground tempera-ture almost steadily lasted several months before the seism,and then arose remarkably and reached to the maxium during the origin month,and it generally fell after the seism;the epicenter located in a negative temperature anomaly area before the seism,then when the seism coming the negative anoma-ly area evaluated promptly to a positive one and its strength and area continuously increased,and got to the maximum during seismic month,they decreased after the earthquake;the thermal anomaly transfered from the deep layer to the surface;the epicentral area is dry and rainy,respectively,before and after the seism. Furthermore,the condition and the possible mechanism by which the thermal in-formation at focus transfered to the surface are also discussed. It shows that,at least for a shallow focus earthquake,the convective heat transformation must is a possible way of heat transformation.