Brain-computer interface apparatus using movement-related cortical potential and method thereof

A brain-computer interface apparatus based on motion-related cortical potential (MRCP) measures a MRCP signal generated during the motion imagination of a subject when brain-computer interfacing is processed based MRCP, detects an EEG signal section including predetermined characteristic elements based on a negative maximum value of at least one sound included in the measured MRCP signal, classifies the related operation condition based on at least one of the characteristic elements of the detected EEG signal section, and detects an instruction corresponding to the classified operating condition. The characteristic element includes a reduction in primary and secondary sounds, the negative maximum value and a rebound ratio. The operation condition includes at least one of a kind of a body part to be imaged in operation, a kind of operation, a speed of operation, and a degree of operation.