PROBLEM TO BE SOLVED: To provide an ordering / financing system, an ordering / financing method and a program for visualizing a multiple contract structure without providing a third party who centrally grasps all the contract contents in the multiple contract structure. SOLUTION: In an ordering / financing system including a plurality of ordering party terminals, a financial institution terminal, a route authentication authority and a public certification service terminal connected via a network, the ordering party terminal of the ordering / financing system is As an orderer, it has an order registration processing unit that creates hierarchical transaction information with hierarchical data including at least the hierarchical level in the multiple contract structure of orders from the orderer to the contractor as output data and sends it to the contractor side. When placing an order from an upper layer orderer in a multiple contract structure to a lower layer contractor in a multiple contract structure, input hierarchical data as output data in the hierarchical transaction information sent from the upper orderer side. Create hierarchical transaction information as data. [Selection diagram] Fig. 2
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