An image forming system includes: a recording material information detecting apparatus; an image forming apparatus; and a management server, wherein the recording material information detecting apparatus includes: a first hardware processor that detects recording material characteristic information; and a second hardware processor that acquires first environmental information, the image forming apparatus includes: an image former that forms an image on a second recording material; a third hardware processor that acquires second environmental information; a fourth hardware processor that transmits the second environmental information to the management server and requests the recording material characteristic information corresponding to the second environmental information; and a fifth hardware processor that sets an image formation condition for the image former to form the image on the second recording material, and the management server includes a sixth hardware processor.