To reduce the operator's burden required for the date management by retrieving a date that is matched with the current date when a menu screen is shown on a display and executing the relevant program after displaying the stored relevant data.

The schedule data are registered in a schedule table 21-1 of a hard disk drive 21 by the input applied via a keyboard 3, etc. The current date/time data received from a clock part 16 and the date data registered in the table 21-1 are checked not only when a power supply is applied but when a menu screen is reset after a prescribed job is over. If the coincident date data are registered in the table 21-1, the schedule data on the date data are read and the message data are shown on a display 2. Furthermore, if the data on the program name that is executed by the schedule data are registered, the relevant program data are executed after the propriety of this execution is confirmed.