1. An image forming system which employs the following image forming method: exposing a photosensitive material to record a latent image thereon; superimposing the photosensitive material and a processing material; heating the superimposed photosensitive material and processing material to form an image on the photosensitive material corresponding to the latent image recorded thereon; peeling the photosensitive material formed with the image off the processing material; reading the image formed on photosensitive material with a scanner to obtain image data representing the image; and subjecting the image data to prescribed image processing to generate reproducible digital image data and is equipped with a developing section for developing a photosensitive material containing photosensitive silver halide grains which when imagewise exposed to record a latent image thereon is formed with an image by heating with a prescribed processing material superimposed thereon, the developing section comprising: superimposing means for superimposing the photosensitive materials and the processing material, heating means for heating the superimposed photosensitive material and processing material to form an image on the photosensitive material corresponding to the latent image recorded thereon, and peeling means for peeling the photosensitive material formed with the image off the processing material.