1. A method of managing resources of a controlled device, the method comprising: monitoring, by the controlled device, an invocation of an action representing a connection of a control point for a predetermined time; determining whether the control point is connected to the controlled device based on whether the action is invoked; and increasing available resources by selectively deactivating an application which is controlled by the control point according to a result of the determining, wherein the action is invoked by the control point and includes a command message for executing a service in the controlled device, and wherein the action includes a specific identifier of the control point inputted as a parameter for determining whether the controlled device is connected to the control point.