u201d when offering information in answer to the solicitation made by the operator if information is offered voluntarily a member clicks u201c free topic u201d thus the nature of provision of information can be determined further in order to facilitate narrowing cataloging and classification of provided information a member enters a solicitation number assigned to the e mail shown in fig6 when offering information in response to a solicitation in contrast a member selects a technical field on a form 132 in which information is to be offered when voluntarily offering information when a member clicks a transmission button 133 after having filled out required items on the form 132 entered information is sent from the terminal 10 to the www server 3 step s 39 upon receipt of the information the www server 3 sends the thus offered engineering information to the database server 5 thus requesting registration of the engineering information into the knowledge database 8 step s 40 the database server 5 which has received the request registers the engineering information in a predetermined format step s 41 and sends information e g a registration number corresponding to a registration result to the www server 3 step s 42 the www server 3 that has received the information informs the terminal 10 that the offered engineering information has been registered step s 43 0065 fig1 shows procedures for evaluating the engineering information offered from members when the operator retrieves unevaluated engineering information by actuation of the operator terminal 6 the operator terminal 6 requests the database server 5 to output unevaluated engineering information step s 51 upon receipt of the request the database server 5 retrieves.