Image password authentication system of portable electronic apparatus and method for the same

The present invention provides an image password authentication system of a portable electronic apparatus and a method for the same. An image with a plurality of image regions is stored in the portable electronic apparatus, and the image regions are selected on a touch panel to generate an authentication parameter. The authentication parameter comprises user-selected image regions, a sequence of user-selected image regions, an elapsed time of selection operation, and requested times of selection operation. The authentication parameter is stored in a database module and is used to verify a validation parameter which is generated when users select the plurality of image regions on the touch panel of the authentication system in operating the portable electronic apparatus. Hence, the image password authentication can be provided to replace the existing number-input or character-input password authentication scheme.