Abstract: In order to ascertain the spontaneous combustion situation in 8201 workface of Tangshangou Coal Mine, the temperature of this goaf was observed on site. The goaf temperature measurement system MKCW100 was used in the test,The field observation scheme was formulated as the measure points arranged along the fully mechanized coal face, and the measure line layout scheme was put forward that the temperature was measured during the mining. So the temperature data of residual coal in goaf was successfully obtained. The Tecplot software was used to process data so that the graphical display of the goaf temperature distribution was realized.