A system is used for acquiring Basic Input/Output System (BIOS) debug codes. The system includes a platform controller hub (PCH), a storage chip, and a baseboard management controller (BMC). The PCH reads power-on self tests (POST) codes from an address port of a bus, and converts the POST codes to binary data and stores the binary data in the storage chip. The BMC reads the binary data stored in the storage chip and defines the binary data as virtual sensor data, which conform with threshold type data, and decodes the virtual sensor data to POST codes and controls a display unit to display the POST codes.