An information processing system that is configured such that a plurality of speakers are coordinated with one information processing apparatus and is capable of coping with a state of competition between instructions to the speakers. An information processing system includes an image forming apparatus, a first voice control device that receives a voice instruction to the image forming apparatus, and a second voice control device that receives a voice instruction to the image forming apparatus. The image forming apparatus is controlled to execute a job based on information on which of the first voice control device and the second voice control device is a device which is to be preferentially used.