Peat fires occur in peat layer (organic soil), roots, dry leaves and other organic matter. This type is smoldering fire (incomplete fire), which can be active for days with flameless and low spreading rates. The depth of smoldering is about tens centimeters but it can be difficult to recognize with the naked eyes. In Central Kalimantan, peat fire is one of big environment issues related to to carbon emission and peatland degradation. The objective of this study was to investigate the change or variation of temperature on the surface peat fires. The temperatures of surface peat fire were observed by thermal (infrared) video system (TVS 600, Nippon Avionic Co., Ltd., Japan), about three hour at one-minute interval. The patterns of surface peat fire were captured by infrared thermal imaging camera (Therma shot F30, Nippon Avionic Co., Ltd., Japan). As a comparison, the temperature on the outskirts of smoldering checked using Thermo Recorder TR-81 (Tashika Boeki Shokai K.K., Japan). The results showed that the apparent temperature profile of an actual peat fire in the MRP area on September 15, 2004 was ranged from 100 to 500oC. Further, the average temperature at the center of the burning identifiedmore than300oC (observation on summer dry season of 2012). The outskirts of smoldering recorded had lower temperature but there were various patterns depending on the conditions of fire ecology and peat itself.