This paper presents an infrared image processing system for monitoring and mapping the thermal distribution of regions in mobile remote sensing applications. The processing system consists of five modules: non-uniformity correction, trajectory segmentation, odd even correction, image projection and visualization. It has been designed to perform thermal mapping efficiently and meet the special requirements of fast data processing. The processing system allows for the viewing of thermal distribution in a 2-d map model. The efficiency and effectiveness of the developed system are evaluated and tested by several image processing tasks.