The invention discloses a method for recognizing a pedestrian in a monitoring system without an overlapped area. The method comprises the following steps of performing color correction among a plurality of cameras, and ensuring that a corrected image is IMi, i=(R, G, B); representing the corrected image IMi, i=(R, G, B) in the step 1 as a product of an intrinsic reflective image RIi, i=(R, G, B) and a radiation image SIi, i=(R, G, B), and extracting the intrinsic reflective image RIi, i=(R, G, B) of the target image; extracting a spatial histogram according to the intrinsic reflective image RIi, i=(R, G, B); recognizing a target; and calculating the similarity of spatial histograms of images acquired by all cameras in the monitoring system and a camera 1, and when the obtained maximum similarity is more than or equal to a set threshold value Th, confirming that the two images are the same target, otherwise, indicating that the target walks out of a monitoring field. The invention has the beneficial effect that the same target is correctly recognized by different cameras under different light sources in different environments.