An information sharing support system includes: a first information processing device connected to a projector device for projecting an image on a projection area including an object therein, and to an image pick-up device for picking up an image of the projection area including the object; 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 to the projector device; a receiving unit that receives a picked-up image from the image pick-up device; 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.