An information input/output system includes printer and facsimile servers, connected with the Internet, and printer and facsimile apparatus connected with the servers, respectively. A terminal accesses information contents on the Internet and transmits printing request data including at least a contents ID specifying information contents for printing and a print outputting destination ID specifying one printer or facsimile apparatus for printing the information contents for printing. A printing request administration server receives the transmitted printing request data and transmits the printing request data to one of the servers according to the print outputting destination ID. The servers store information as to the printer and the facsimile apparatus, and outputs the information contents for printing to the one of the servers determined according to the print outputting destination ID, after converting the information contents for printing, according to the information corresponding to the one apparatus specified by the print outputting destination ID, such that the information contents for printing can be printed by the one apparatus.