Based on the data obtained from the 1:5 000 helicopter electromagnetic and magnetic comprehensive survey in 2004, in combination with ground coal geology as well as geophysical prospecting and remote sensing information, the authors studied the relationship between the aeroelectromagnetic or aeromagnetic characteristics and the distribution of underground coal fire in Wuda area, Inner Mongolia. Through a comprehensive analysis, the dividing indexes for underground coal fire of this area were built, and the distribution and burning situation of underground coal fire in this area were analyzed.