The present invention relates to a communication service system using a unique number, to having to use a wireless mobile phone users a virtual private number via the G / W (Gate Way) of the wire network that provides wireless and privacy of a wired personal guarantee access service have. In the present invention, to provide a wired or wireless two-way personal telephone information service using the unique number, receives from the unique number from the existing wire or wepmang, caller oil, it can protect privacy as originating through the unique number from the wireless terminal, and the recipient oil, is a unique number of the receiver determine the caller from the wireless terminal and the caller's privacy, the recipient can also be a call to the caller with a unique number so registered as a part to supplement the disadvantages of privacy protection, and a conventional serial number When call any of several telephones, 050 * then received their own unique numbering after the relative numbers when attempting to call and then enter the mobile phone CID (Caller ID) of the person received, individuals received your grant to provide a two-way personal information protection service phone calls possible by a unique number.