Phone and method for providing called user information

PURPOSE: A communication terminal device providing user information of a receiving part and its method are provided to receive the user information corresponding to a receiving telephone number from a network access device and then to provide it to a caller. CONSTITUTION: The communication terminal device(100) includes a speaker part(150), and a display part(120) displaying operation state and external input items of the communication terminal device, and a communication interface part(160) providing communication interface with an external network access device. A memory part(140) stores and manages operation information including basic operation information of the communication terminal device, additional service information and user information per telephone number. And a main processor part(110) extracts user information corresponding to a telephone number of the receiving part inputted from the communication terminal device from the memory part or from the external network access device through the communication interface and then provides it to a caller through at least one of the speaker part and the display part.