Door opening or shutting apparatus and method for using a mobile terminal

PURPOSE: An apparatus and method for opening and closing a gate using a mobile communication terminal is provided to mount Bluetooth modules in a fixed device and a portable device, confirm personal information of a user by a wireless type using the Bluetooth module, and control the gate. CONSTITUTION: A fixed device(106) requests the input of a password to a portable device(102) when a registered portable device(102) is sensed, receives the password when the password is inputted from the portable device(102), compares the received password with a password of registration information, and opens a gate when the received password is identical to the password of registration information. The portable device(102) encrypts a password inputted by a user when the fixed device(106) requests the input of the password and transmits the encrypted password to the fixed device(106).