Abstract: Combined with the research development at home and abroad, following problems were analyzed and summarized in the paper, such as the application of infrared thermal image technology(ITIT) on the concrete detection, the quantitative calculation of depth and size of building defects, and the practical use of the research results in omplex projects. Limitations and deficiency of the current research were pointed out in the paper. The application prospect and development direction of ITIT in the concrete detection field were also indicated.