A work system includes a robot control device, a robot, an image processing device, and an imaging device. The robot control device controls an operation of the robot using a teaching point. The image processing device acquires an image by controlling the imaging device and capturing an image of a workpiece at the teaching point, and stores image data after imaging in association with data of an operation position of the robot corresponding to the teaching point. When a user performs work restoration, the image processing device performs a process of assisting with setting of work restoration by performing control for acquiring an image captured by the imaging device at the operation position of the robot during work restoration and displaying a difference between the image and the stored image.