To provide digital contents provided from a plurality of digital holders, in optimum display order for the respective content holders.

A sales server 20 receives placing information requested to place in a homepage, from a plurality of providers. A content holder registering section 28 associates to store the placing information and provider identification information for identifying providers of the provided information. An analyzing section 32 acquires and analyzes link source information and specifies a link source provider homepage. A merchandise bulletin section 27 preferentially places the placing information provided by the provider who manages the link source provider homepage, in the collection homepage based on the analyzed result.