The invention belongs to a system of testing electromagnetic radiation during a coal spontaneous combustion process. The system of testing electromagnetic radiation during the coal spontaneous combustion process includes a temperature acquisition computer, a high precision thermal infrared imager, a high temperature resistant ceramic heating ring, an electromagnetic radiation monitoring probe, a preamplifier and a high speed acoustic-electric acquisition apparatus, wherein an outer cover of the ceramic heating ring is made of an aluminium plate, and a heat transfer medium of the ceramic heating ring utilizes 95 alumina ceramics, and a heat-generating body of the ceramic heating ring is high performance nickel-cadmium wire; two sides of the ring body of the ceramic heating ring are each provided with an opening; the high precision thermal infrared imager and the electromagnetic radiation monitoring probe are respectively arranged at the outer side of the two openings; the thermal infrared imager is connected with the temperature acquisition computer through a data line; the electromagnetic radiation monitoring probe is connected with the preamplifier; the preamplifier is connected with the high speed acoustic-electric acquisition apparatus; and the thermal infrared imager, the electromagnetic radiation monitoring probe and the high temperature resistant ceramic heating ring arearranged in an electromagnetic shielding chamber. The system of testing electromagnetic radiation during the coal spontaneous combustion process can simulate and analyze the magnitude and rule of theelectromagnetic radiation signal intensity in different heating rate conditions for coal and rock mass under coal mine.