A Brain computer interface (BCI) based computing device that provides the common pattern of a brain signal includes a memory for storing the common pattern providing program, and a processor executing a program stored in the memory. At this time, according to the execution of the program, the processor performs pre-processing on the brain signal of each user, extracts the characteristic of the pre-processed brain signal, stores it in a database, generates the characteristic of each brain signal and a plurality of brain signal characteristic patterns defined by a classifier parameter for classifying each operation state based on the characteristic, and extracts a common signal pattern of the brain signal, which is a common pattern for each operation state for all users, from the brain signal characteristic patterns. It is possible to generate a separate classifier for new subjects and/or skip a leaning task.
DEVICE AND METHOD FOR PROVIDING COMMON PATTERN OF PLURALITY OF BRAIN SIGNAL