Provided is a diagnosis apparatus. The diagnosis apparatus includes: an internal device inserted into an inside of a body and moving therein and an external device located at an outside of the body and controlling the internal device, wherein the internal device includes: a first communication unit communicating with the external device a power supply unit supplying power for driving of the internal device and a first control unit controlling an operation of the internal device according to a control signal when the control signal is received from the external device, and the external device includes: a second communication unit communicating with the internal device a location detection unit processing a signal received from the internal device to detect a location of the internal device and a second control unit generating a control signal for controlling the internal device based on the location of the internal device.
