Method for controlling bill-processing machine

A method for controlling a bill-processing machine, comprising:

• identifying a bill when the bill is loaded to the bill-processing machine;
• increasing existing amounts in existing-amount memories for corresponding money types in the bill-processing machine as a result of the identification of the bill;
• transferring the bill which has been identified to one bill housing in the bill-processing machine regardless of a kind of the bill, in which the transferred bill is stacked and retained therein;
• unloading a bill from the bill housing in the bill-processing machine based on a money output instruction;
• identifying the bill unloaded from the bill housing;
• and
• controlling a switching gate located in a path extending from the bill housing to be switched between an output port and a circulating path returning to the bill housing, said switching gate, if the identified bill for unloading is to be output, being switched to said output port to unload the bill from the output port and the existing amount in the existing-amount memory for a corresponding money type of the bill guided to the output port being reduced, and if the identified bill is not to be output, being switched to the circulating path to return the bill not to be output from the output port to the bill housing without changing the existing amount in the existing-amount memory, which is repeated until an indicated amount to be output has been reached.