1. A storage area management system provided to a computer system having a plurality of storage areas and a plurality of application programs using one or more of the storage areas as a resource, the storage area management system comprising: a management data obtaining unit for obtaining area management data in which one or more storage area IDs identifying one or more storage area candidates among the plurality of storage areas is associated with each application program; a policy data obtaining unit for obtaining selection policy data stating a guideline for storage area assignments based on operational status of the application programs; an operational status detecting unit for detecting operational status of each of the plurality of application programs; an area assignment determining unit for using the detected operational status and the obtained selection policy data to refer the obtained area management data, and searching through the one or more storage area IDs associated with each application program to extract the storage area ID of the storage area to assign to each application program; and an assignment information output unit for outputting assignment information about which application program to assign which storage area, based on the storage area ID extracted for each application program.