The invention discloses a delivery monitoring method and device, and relates to the technical field of computers. A specific implementation of the method includes: collecting multiple frames of images in a designated area, identifying the delivery site of the target object in the multiple frames of images, determining the location of the delivery site, and extracting the delivery site image; according to a predetermined slice processing method, Perform slice processing on the delivery site image to obtain color picture slices and frame difference picture slices; input the color picture slices and frame difference picture slices into the predetermined behavior recognition network to obtain the delivery stage of the target object. In this implementation mode, only the delivery site of the target object to be delivered is monitored to reduce the interference of unnecessary factors; the traditional 3DCNN network is improved, the input of video frame difference is increased, and the robustness of the overall method is greatly improved , the overall replacement of the existing artificial care, reducing the cost of input.