The present invention provides a purchase management system which comprises an AS specific dividing controller 19 for performing control of dividing the purchase request per administrative standard when the AS specifying unit determines that the administrative standards of the respective items to which the purchase request was made differ; an administration controller 21 for receiving the purchase request divided per administrative standard and administratively controlling the purchase request; a divided ordering controller 22 for performing control of dividing and ordering the purchase request per item specific dealer when the administration controller allows the purchase request; and an order totaling controller 23 for totaling the order data ordered by the divided ordering controller according to the attribute of the expense item of the order.