An IP telephone terminal and a method for controlling IP telephone terminal capable of performing IP telephone communication upon receiving information from a conversation application through a user interface provided with a microphone and a loud speaker when a conversation is to be performed with the microphone and the laud speaker. The IP telephone terminal is connected to an internet. The terminal has a mouse and a keyboard operable as an operation input device, and a microphone and a loud speaker operable as an audio input device. A first selecting unit selects the operation input device of an interface device, and a second selecting unit selects the audio input device of the interface device. A third selecting unit selects one of the interface devices. A first control part controls the first selecting unit so that the first selecting unit selects the operation input device of the interface device selected by the third selecting unit. A second control part controls the second selecting unit so that the second selecting unit selects the audio input device of the interface device selected by the third selecting unit.