Abstract: In order to improve the effect of remote infrared monitoring of concrete fissures, a remote infrared monitoring method for concrete fissures at the base of the riverbed section of the dam core wall was designed. firstly,a conductive film cloth was laid on the concrete surface and the resistance pull-sensing effect of the conductive film was analyzed. Then, an infrared image through an infrared thermal imaging monitor was obtained, and the defect detection situation was determined through calculating the temperature difference between the test target and the background target. On this basis, the Fourier transform is used. The method combined with K-means clustering is used to process the infrared heat map to realize remote infrared monitoring of concrete cracks in the base of the riverbed section of the dam core wall. The experimental results showed that the proposed remote infrared monitoring method for concrete cracks in the base of the riverbed section of the dam core could generate more accurate infrared images, and could more accurately monitor the length of the cracks. The maximum error is about 5 mm, which effectively improves the long-distance infrared monitoring effect.