1. An eye-controlled password input apparatus, comprising: a display device for displaying a password menu divided into a plurality of display areas located at different positions, each of said display areas corresponding to an input password character; an image capturing device for taking an eye image of a user; a memory unit for storing at least one preset password and a corresponding account number; a control unit for generating the password menu according to the preset password; and an image processing unit for obtaining a plurality of reference objects from the eye image and generating an eye movement direction according to the reference objects; wherein the image processing unit selects a corresponding display area according to the eye movement direction and thereby inputs a said input password character; and wherein after the image processing unit inputs the said input password character, the control unit automatically generates another said password menu on the display device in order for the user to determine another said input password character until a password input process is completed.