A robot system, including one or more robots which are provided to a first area where an entry by a person is restricted, and configured to perform a first work which includes one or more steps in the first area, a controller configured to control an operation of the one or more robots, and a visitor detector configured to detect a visitor to the first area. The controller includes a first work control portion configured to control the one or more robots so that the one or more robots perform the first work in the first area, and a first suspension control portion configured to control a predetermined at least a first robot of the one or more of the robots when one or more of the robots are performing one of the steps in the first area based on control by the first work control portion and the visitor is detected by the visitor detector, so that the first robot performs a predetermined act of suspension after performing the first work up to any predetermined stage, including an intermediate stage of the one step, a successful completion stage of the one step, and a successful completion stage of another step after the one step.