The embodiment of the invention provides a cross-camera recognition method, device and system for a target pedestrian. The method comprises: acquiring an initial image of the target pedestrian; performing target detection in each monitoring image acquired by each camera in the camera group to obtain a plurality of matching images matched with the initial image; determining a matching image as a real target, and performing real target pedestrian tracking, the real target corresponding to the first camera; selecting a second camera having a spatially adjacent camera vision field with the first camera from the cameras corresponding to the plurality of matching images, determining the matching image corresponding to the second camera as a pseudo target, and performing pseudo target pedestriantracking; in the real target pedestrian tracking process, when it is determined that a real target enters the camera vision field of the second camera from the camera vision field of the first camera,eliminating the false target when real target detection is carried out on a monitoring image collected by the second camera. And the target pedestrian can be identified accurately and quickly.