System and method for promptly back-up operating recodings of user before system halted

The invention relates to a method to backup the operation record of user before computer shut down. It comprises a executing module, a CPU module, RAM and flash. The executing module receives control signal to execute the function, and send error information when error occurs. The CPU module receives control signal and error information, and distributing control signal and error information. RAM receives and storing control signal and error information. When system executing error information, the flash would save control signal, error information and system executing error information. When the CPU module receiving system executing error information, the control signal in RAM, error information and the system executing error information sent by operation system would be captured, and be written into flash. Thus, the purpose of backup the operation record before shut down would be realized.