Provided is an image
projection system including a screen, an input terminal, an
image processing unit, an image
projector, and invisible light
ray-shielding member, characterized in that: the screen has a pattern-printed sheet having reflection patterns for transmitting positional information by reflecting invisible light rays or absorption patterns for transmitting positional information by absorbing invisible light rays; the input terminal has an invisible light
ray-applying portion, detects a reflected light
ray of an invisible light ray, which is applied from the invisible light ray-applying portion and reflected from a specific site of the pattern-printed sheet, reads positional information of any one of the reflection patterns or any one of the absorption patterns, and outputs the positional information to the
image processing unit; the
image processing unit converts the positional information input from the input terminal into image information A, and transfers the image information A to the image
projector; the image
projector converts the image information A transferred from the image
processing unit into visible light rays, and projects the visible light rays on the screen; and the invisible light ray-shielding means is placed in front of or inside the image projector, and removes the invisible light ray from the visible light rays to be projected. The present invention can provide the image
projection system in which, even when a screen is large, the positional information of the screen can be simply input in a non-contact fashion with high accuracy, and image information converted from the input positional information can be further converted into visible light rays to be projected.