A network system 1 transmits data between a management apparatus 2 and managed devices 3 each connected to a communication network, processes the data, and displays resources of the managed devices 3 in association with users and/or organizations of the managed devices 3, thereby to support system management operations. That is, in the network system 1, the management apparatus 2 displays an organizational map in a tree form that shows employee numbers of users who belong to each subordinate organization (division/section) that makes use of the system in association with an identifier of such a subordinate organization, displays users who belong to a designated subordinate organization in association with the users' managed devices 3, displays resources of a designated managed device 3, and causes the designated managed device 3 to execute a process using its resources.