1. A remote instruction system comprising an attention image outputting portion that projects an annotation image and an attention image from a projecting portion onto a captured area of an image capturing portion that captures an image of an object, the annotation image being created on the basis of the image captured, the attention image being provided for attracting attention to the annotation image, wherein the attention image outputting portion changes an output state of the attention image according to a change of an output state of the annotation image.