Abstract: An imaging system for shooting and storing a plurality of processes that are performed using fingers of both hands, and eyes, comprising a control processor that detects the processes based on taken images that correspond to finger tip positions of either the left or right hand of a worker, from positions corresponding to the eyes of the worker performing the process, and a memory that stores taken images, and taken images in association with the processes, wherein the control processor 1) detects which of the left or right hand of the operator is being used in the process, 2) determines a first used tool or material to be used that is used by the detected hand, 3) detects operation start time in accordance with detection results for the first used tool or material, and 4) reasons the taken images corresponding to the start time by analogy.