1. An apparatus for reporting an operation state of digital rights management (DRM) of a control device to a control point in a home network formed with the at least one control device and the control point, the apparatus comprising: a DRM module which performs DRM; a state variable generation unit which receives DRM operation state information indicating the state of a DRM process currently operating, from the DRM module, and generates DRM state variables based on the received DRM state information; and a universal plug and play (uPnP) module which, by using a uPnP protocol, transmits the state variables generated by the state variable generation unit to the control point.