The present invention provides a network contents managing system on a
network comprising: a contents database retaining locations and
attributes of contents and data; a retrieval request detection unit for
detecting a retrieval request to the contents database and outputting a
retrieval request information; a network monitoring unit for monitoring a
change of an apparatus connection state to the network and, upon
occurrence of a change of the connection state, outputting a new
apparatus connection state as a connection state information; a contents
monitoring unit for outputting a contents modification information when a
location and an attribute of contents and data is modified; a database
retrieval unit for retrieving the contents database upon reception of the
retrieval request information and outputting a retrieval result
information; a database managing unit for performing registration and
modification in the contents database upon reception of the connection
state information and the contents modification information; and a
retrieval result output unit for outputting the retrieval result
information to the apparatus which has made the retrieval request. Thus,
it is possible to dynamically grasp the client apparatus connection state
and the contents modification.