Apparatus and method for preventing loss of portable terminal

An apparatus for preventing a loss of a portable terminal, the apparatus comprising:

• a luminous intensity sensor unit for detecting a current luminous intensity level;
• a main controller unit configured for comparing the current luminous intensity with a reference luminous intensity, for substituting the reference luminous intensity with the current luminous intensity when the current luminous intensity is lower than the reference luminous intensity, for determining whether the portable terminal is in a calling state when the current luminous intensity is higher than the reference luminous intensity, for controlling a request for an input of a password, for controlling an output of a warning sound when the current luminous intensity is higher than a reference luminous intensity and the portable terminal is not in the calling state, and for controlling stopping of the output of the warning sound when the password inputted matches a predetermined password;
• a display unit for outputting a screen requesting the password and for outputting other screens related to a process of loss prevention according to the controlling of the main controller unit;
• a key input unit for inputting the password and keys in accordance with the request from the main controller unit;
• a memory unit in which the current luminous intensity detected by the luminous intensity sensor unit and the reference luminous intensity are saved;
• and
• a warning device for generating and outputting the warning sound in accordance with the controlling of the main controller unit.