A position information generating unit of a personal computer generates
position information using GPS and/or PHS, and outputs the generated
information to a supplementary information generating unit. The
generating unit supplements the position information from the position
information generating unit with additional information such as map data,
and outputs the supplemented information to an HTML generating unit. The
HTML generating unit generates an HTML file out of the supplemented
position information from the supplementary information generating unit,
and transmits the generated file to a content server. A position
information transmission-reception control unit of the content server
stores the HTML-format position information thus sent from the personal
computer into a storage unit. An HTML acquiring unit of the personal
computer acquires position information in HTML format about another
member from the storage of the position information
transmission-reception control unit, and causes the obtained information
to appear on a display unit.