Robot cleaner and robot cleaner system having the same

According to one embodiment of the present invention, is provided to the module with a different functionality to the robot cleaner can be combined can perform various additional functions other than the cleaning and driving the robot cleaner. The robot cleaner according to an embodiment of the present invention is a robot vacuum cleaner while traveling on the floor surface to clean the floor surface, the additional mounting of the robot cleaner, a module that has at least one module that can perform functions other than the cleaning may be mounted It is provided.