There is described a network system that includes a plurality of image forming apparatuses, which are coupled to each other through a network, and each of which makes it possible to output guidance by emitting an audible voice from an image forming apparatus located in the vicinity of the specific user who has instructed any one of the other image forming apparatuses to implement a print job. Each of the plurality of image forming apparatuses includes: a communication section to bilaterally communicate information with other image forming apparatuses; an authenticating section to authenticate whether or not the specific user resides in a peripheral area of the image forming apparatus concerned; and a voice outputting section to output the guidance for the specific user by emitting the audible voice.