Abstract full text content: City hot environments is that the city space environment is in heating power synthetical behaviour in field, situation studying city hot environments can know development of city space structure and city. The temperature backcalculation studying the earth's surface wielding LST is bright originally follows the backcalculation carrying out the bright temperature on the image the city high resolution artificial satellite Landsat TM is studied. Apply hierarchic method of heat island intensity to divide the bright temperature of city of the backcalculation queen into the heating power speckle piece being unlike a grade , lead into landscape at the same time analytical space pattern research method, use the field coming to study the city is hot heating power landscape viewpoint. Study hot three plain the southern part middle-sized and small cities host urban area field has carried out contrast studies on Chengdu originally, hot environments situation using image to have reflected three cities, and use quantitative data to have reflected every among the cities heating power landscape difference. Always, decide the comparative analysis queen , be to improve the urban environment, the tropical island effect relieving a city has brought forward the feasibility idea.