PURPOSE: To execute movement or copying of a document to plural moving destinations or copying destinations by a simple operation.

CONSTITUTION: A temporary retaining file 11 which can store plural kinds of document data such as a character, a ruled line, a graphic, etc., is provided, the necessary number of document data which become a copying origin or a moving origin are retained temporarily, and by a reference operation of the temporary retaining file 11 after a designating operation of a copying destination or a moving destination, the document data which becomes the copying origin or the moving origin stored in the temporary retaining file 11 is displayed together with the document data of the copying destination or the moving destination. and in its displayed document data of the copying origin or the moving origin, desired document data is selected and designated, and this selected and designated document data is copied or moved to the designated copying destination or moving destination.