An operation training system includes, a first display device for a first user, a second display device for a second user who learns robot operation from a first user, and a control system configured to move, based on an input made by a second user using a second user input device, a robot displayed on the second display device. The control system is configured to move, based on an input made by the first user using a first user input device, a robot displayed on the first display device. The control system is also configured to display, on the second display device, a motion of the robot based on the input made by the first user using the first user input device.