Transceiver device and power saving method thereof

A transceiver device, comprising:

• a transmitter;
• a receiver;
• and
• a control module, coupled to the transmitter and the receiver, for checking a signal transmission between the transceiver device and a far-end device is normal or not after lowering output power of the transmitter, the receiver or both of them, wherein when the signal transmission between the transceiver device and the far-end device is abnormal, the control module readjusts the output power of the transmitter and the receiver;
• wherein, the transmitter transmits a plurality of signals encoded by at least two different encoding formats separately in sequence to the far-end device, and the control module checks the encoding format of each of a plurality of received signals encoded by a first encoding format from the far-end device received by the receiver to determine the signal transmission between the transceiver device and the far-end device is normal or not, and the transmitter transmits a plurality of transmitted signals encoded by a second encoding format to inform the far-end device that the adjustment of the receiver has been finished when the signal transmission between the transceiver device and the far-end device is normal.