An information sharing support system is provided. The system includes a first information processing device connected to a projector device for projecting an image on a projection area, and to an image pick-up device for picking up an image of the projection area; an inputting unit that inputs an event in a first layer, inputs a second annotation image as a part of a first annotation image associated with the event to a second layer, inputs a third annotation image as the remaining part of the first annotation image to a third layer, and inputs a document to a fourth layer; a transmitting unit that transmits the second annotation image; and a second information processing device that allocates the picked-up image to the second layer, and includes a display that displays the third annotation image and the document in an overlapping fashion.