Disclosed are a robot cleaner, and a system and method for remotely controlling the robot cleaner. Since the robot cleaner is accessed to a terminal through a network, the robot cleaner can be controlled in more various manners. A situation inside a house can be real-time checked from the outside, and the satiation can be rapidly handled according to a state of the robot cleaner. Since the terminal and the robot cleaner are connected to each other through a network, a voice call function and an interphone function can be implemented. Furthermore, the robot cleaner can perform automatic cleaning, manual cleaning, and reservation cleaning in an autonomous manner, or in a remote-controlled manner.