An image forming system includes a first mobile terminal and an image forming apparatus. The first mobile terminal transmits first image data by carrying out first wireless communication. The image forming apparatus receives the first image data by carrying out the first wireless communication and forms an image on the basis of the first image data. The first mobile terminal includes first storage, a first communicator, and a first setting section. The image forming apparatus includes second storage, a second communicator, a second setting section, and an image forming section. The first and second storages both hold first communication setting information and are respectively able to hold second and third communication setting information. The first and second setting sections, when the first and second communicators, respectively, carry out first wireless communication, configure communication setting of the first and second communicators, respectively, on the basis of the first communication setting information.