The present invention provides a personal video recorder and control method thereof, by which two scrambled transport streams can be descrambled to fit the open cable standard. The present invention includes storing a video stream of a recording channel in a storage means, determining whether a video stream of a displaying channel is transferred the POD module, descrambling the stored video stream of the recording channel using the POD module if the video stream of the displaying channel is not transferred to the POD module, and storing the descrambled video stream in the storage means.