Patent ID: 8515938

Claim:
An information processing system comprising: a client configured to receive and reproduce content from a media server; and a collecting server, including a processor, configured to receive content management information on said content from said media server and to manage said content management information, said content management information being different than said content, said content management information including a thumbnail image representing said content and a creation time and date of the content, said collecting server configured to obtain at predetermined intervals a flag changed by determining that a change is made to said content and to obtain only said content management information including the thumbnail image and the creation time and date of the content and not said content from said media server by reading from a value of the obtained flag that a change has been made to said content; wherein said client includes a communication unit configured to transmit a search condition for retrieving said content to said collecting server, and to receive a list of content information corresponding to said search condition, said collecting server includes a receiving unit configured to obtain said content management information from said media server according to a predetermined condition, a content information database generating unit configured to store information on a content storage location which information is included in the obtained content management information as category information of said content, and to generate a content information database, a content information list generating unit configured to extract content information matching said search condition from said content information database on a basis of said category information and to generate a list of said content information by receiving a search condition transmitted from said client, and a transmitting unit configured to transmit the list of said content information generated by said content information list generating unit to said client.