PURPOSE: To efficiently operate a work and a money processor by displaying a scheduled time to exchange a safe for paying-in and a safe for paying-out in a display part based on the data of transaction quantity.

CONSTITUTION: Paying-in counters 2 and 3 are provided to count paying-in money and paying-out counters 4 and 5 are provided to count paying-out money. Then, a control part 10 respectively estimates the scheduled time when the safe for paying-in is filled up, and the scheduled time when the safe for paying- out is made empty, based on the transition data of the transaction quantity and outputs the respective times to a display 6. Thus, it is prevented in advance that the safe exchanging work is suddenly generated. Then, the work is efficiently executed and the device can be efficiently operated.