The invention discloses a method of hard disk hibernation in a digital TV receiving device and a digital TV receiving monitoring device and a system thereof. The method comprises the steps that the digital TV receiving device is detected to see whether the device operates a hard disk currently; the hard disk hibernation is monitored according to the result of detection: if the device does not operate the hard disk currently, a control command is sent out to control the hard disk to hibernate and if the device operates the hard disk currently, the working state of the hard disk is maintained or the control command is sent out to wake up the hard disk to enter the working state. The method of the invention detects whether the device operates the hard disk in a real-time manner and controls the hard disk hibernation accordingly, thus not only reducing the electric energy consumption caused by the hard disk, but also prolonging the service life of the hard disk.