An automatic teller machine comprises a plurality of banknote boxes (2) in different amounts, in which a plurality of banknote packages (11) packed in advance are loaded, each banknote package (11) having therein one to hundreds of banknotes, both the top and bottom of the banknote package (11) being printed with the same identification bar codes (1102), such that when a banknote package (11) is output from the banknote box (2), the banknote box (2) can know if the output banknote package (11) is overlapped or wrong by using the two identification bar codes (1102) at the top and bottom of the banknote package (11). When withdrawing money, the control and communication circuit unit (1) controls said banknote box (2) and the transfer roller (7) within the automatic teller machine to output a banknote package (11) corresponding to the amount of money to be withdrawn to a banknote output opening (8) for the payee to withdraw. Besides, since the banknotes are packed in a banknote package in advance, both new and old banknotes can be used as long as they can be packed in a banknote package (11). Further, some paper small changes can also be packed into a banknote package (11).