An automatic teller machine includes a banknote conveyance channel, a banknote recycling channel, and a banknote circulation channel. The banknote conveyance channel includes an annular channel, a first branch channel, a second branch channel, a third branch channel, a fourth branch channel, and a fifth branch channel. A banknote-in mechanism communicates with the annular channel via the first branch channel. A temporary storage mechanism communicates with the annular channel via the second branch channel. A banknote-out mechanism communicates with the annular channel via the third branch channel. Two ends of an identification mechanism communicate with the annular channel via the fourth branch channel and the fifth branch channel, respectively. A recycling box communicates with the banknote conveyance channel via the banknote recycling channel. A circulation box communicates with the banknote circulation channel via the banknote circulation channel.