An image forming system includes an image forming apparatus having a light emitter and an information terminal performing visible light communication and normal communication with the image forming apparatus. The image forming apparatus includes a visible light output unit outputting information stored in the image forming apparatus through visible light communication using the light emitter, and an output control unit controlling operation of the visible light output unit. The information terminal includes a light receiver, and an information acquisition unit acquiring visible light communication information based on information obtained by receiving visible light with the light receiver. The information acquisition unit gives a light emission communication start request to the output control unit through the normal communication with the image forming apparatus. When the light emission communication start request is received and the visible light output unit is stopping outputting information, the output control unit allows output of information.