A teaching system configured to teach operation to a plurality of robots includes a first controlling device which determines whether a first robot and a second robot are in an enabled state where the first and second robots are permitted to operate, and when the first controlling device determines as in the enabled state, the first controlling device transmits an enable signal indicative of permitting the second robot to operate and enables the first robot to be taught the operation when a teaching terminal specifies the first robot. When a second controlling device receives the enable signal from the first controlling device and the teaching terminal specifies the second robot, the second controlling device enables the second robot to be taught the operation.