An image processing terminal and a method for controlling an external device are disclosed. The image processing terminal comprises a receiving unit configured to receive a control signal including information about a normal input or a force input applied to a specific key of a remote controller; and a processor configured to control the image processing terminal or an external device connected to the image processing terminal according to the received control signal. Here, the processor controls an operation of the external device in response to the force input applied to the specific key of the remote controller, an operation of controlling the external device according to the force input applied to the specific key is different from an operation of controlling the image processing terminal or an operation of controlling the external device according to the normal input applied to the specific key.