To perform registration of a schedule and confirmation of contents thereof without instruction of switching operation.

A registration-search determination part 23 determines whether a character string recognized by a language analysis part 22 has a first state including a date or either the date or a time, or a second state including the date or either the date or the time and a schedule content, and a schedule registration-search part 24 searches a schedule database 26, when the first state is determined, to read a record related to the date or either the date or the time, and displays the content of the record on a display part 13. The schedule registration-search part 24 creates, when the second state is determined, a record of schedule data including a date related to the recognition of the language analysis part 22, a time zone based on the time, and the schedule content, and stores it in the schedule database 26.

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