Abstract: To provide power management for a computer, the computer includes: a resource manager for examining a running application and a usage status of an examination object device; and a policy manger for receiving, from the resource manager, information about the running application and the usage status of the examination object device, and for selecting a job type corresponding to the information, in a plurality of job types predetermined for the running applications. The resource manager receives, from the policy manager, the selected job type, and sets a parameter of a control object device thereinto. The parameter of the control object device is predetermined for the selected job type. A job type reported by the policy manager may be a job type name or a set of operating modes of the control object device.