A password verifying method includes the following steps: providing a plurality of interactive regions in which several known password characters are arranged and shown randomly, at least one interactive region containing at least two characters; accepting selection of one of said plurality of interactive regions by a user, and after selection of one of the interactive regions by the user, randomly re-distributing said several known password characters into said interactive regions for subsequent selection by the user; and comparing characters contained in a predefined password sequence with characters contained in the interactive regions selected by the user, and outputting a signal representing a successful password verification when each character contained in the password sequence is identical to corresponding ones of the characters shown in respective ones of the interactive regions selected by the user.