Hard disk working state monitoring system and method

A hard disk working state monitoring system comprises a hard disk controller, an MCU, a shifting register and a plurality of indicator lights, the hard disk controller is connected with a hard disk, and stores SGPIO information of the hard disk, the input end of the MCU is connected with the hard disk controller, the MCU is used for reading hard disk working state information in the SGPIO information, the MCU comprises an SGPIO signal processing unit which is used for processing the read hard disk working state information into working state information capable of being recognized by the shifting register, the output end of the MCU is connected with the shifting register, the MCU is used for transmitting the processed working state information to the shifting register, the shifting register is connected with the indicator lights, and the shifting register is used for displaying the received hard disk working state information through the corresponding indictor lights. The invention further disk loses a hard disk working state monitoring method.