Network conferencing system and proceedings preparation method, and conference management server and proceedings preparation method

The proceedings are prepared in a simple manner. A conference management server ( 11 ) has: a proceedings control section ( 44 ) for preparing time information indicating when presentation data is outputted to a projector device ( 15 ) while preparing time information indicating when material data generated by, for example, a scanner device, is outputted to the projector device ( 15 ), and for preparing conference management information relating to a conference; a data storage section ( 45 ) for storing the presentation data presented by the projector device ( 15 ), the time information indicating when the presentation data is presented, generated by the proceedings control section ( 44 ), the material data generated by the scanner device, the time information indicating when the material data is presented, and the conference management information; and a proceedings preparation section ( 49 ) for arranging the conference management information, the presentation data and the material data in accordance with the time information and thus preparing proceedings data.