A remote instruction system includes a control portion. The control portion transmits a first image to a remote terminal and controls a projection portion to project a first annotation image onto a subject according to an instruction issued from the remote terminal on the basis of the first image, and the control portion transmits a second image to the remote terminal and controls the projection portion to project a second annotation image onto the subject according to the instruction issued from the remote terminal on the basis of the second image, the first image being captured by a first image capturing portion provided for capturing the first image of the subject, the second image being captured by a second image capturing portion provided for zooming a given area of the subject to capture the second image, when the given area in the first image is selected from the remote terminal.