Method and apparatus for electronic memo processing for integrally managing document including paper document and electronic memo added to the document

1. Field of the Invention An electronic memo adding and displaying apparatus includes a tablet with integrated display for electronically acquiring an electronic memo to a document input by a user through a virtual transparent input sheet registered to be overlapped with an arbitrary object document and for displaying the electronic memo on the virtual transparent input sheet, and a control unit performing an electronic memo storing process, for storing the electronic memo acquired through the tablet with integrated display in a storage while associating the electronic memo with the object document.