In the paper, the capability of the uncooled thermal imaging system is discussed. The primary reason affecting the integrated capability of thermal system and the basic method of increasing the capability are analysed. The basic princip le and the realizing method of the original dummy electronic micro scanning technique are introduced.The useful information for infrared image of the far small target is zoomed out. The real-time image processing is engaged in by using DSP + FPGA structure. Results show that the dummy electric micro-scanning technique is propi-tious to recognize target, and the effect iswell.