A display apparatus comprising: a controller configured to interpose a visual stimulus signal having a predetermined frequency between basic visual information frames which do not contain the visual stimulus signal, wherein the visual stimulus signal is interposed between immediately adjacent basic visual information frames; a display unit configured to display the visual stimulus signal for generating an electroencephalogram (EEG) signal and the basic visual information frames; a communication unit configured to receive the generated EEG signal from an EEG detector for detecting the EEG signal of a user ; and an EEG analyzer configured to determine a frequency occupied by the generated EEG signal, wherein the controller is configured to divide a screen image of the display unit into a plurality of regions, and interpose visual stimulus signals having different frequencies between basic visual information frames displayed on the divided regions, wherein the EEG analyzer is further configured to determine a region gazed by the user among the plurality of regions based on the determined frequency, and wherein the controller is further configured to: store the determined region in a storage , such that a database for the use history of the user is generated by accumulating the determined regions, perform a control function corresponding to the region gazed by the user , and adjust a size of each of the plurality of regions based on the use history of the user according to how many times the user gazes at the respective regions such that a region frequently gazed by the user is enlarged in size. a controller configured to interpose a visual stimulus signal having a predetermined frequency between basic visual information frames which do not contain the visual stimulus signal, wherein the visual stimulus signal is interposed between immediately adjacent basic visual information frames; a display unit configured to display the visual stimulus signal for generating an electroencephalogram (EEG) signal and the basic visual information frames; a communication unit configured to receive the generated EEG signal from an EEG detector for detecting the EEG signal of a user ; and an EEG analyzer configured to determine a frequency occupied by the generated EEG signal, wherein the controller is configured to divide a screen image of the display unit into a plurality of regions, and interpose visual stimulus signals having different frequencies between basic visual information frames displayed on the divided regions, wherein the EEG analyzer is further configured to determine a region gazed by the user among the plurality of regions based on the determined frequency, and wherein the controller is further configured to: store the determined region in a storage , such that a database for the use history of the user is generated by accumulating the determined regions, perform a control function corresponding to the region gazed by the user , and adjust a size of each of the plurality of regions based on the use history of the user according to how many times the user gazes at the respective regions such that a region frequently gazed by the user is enlarged in size. store the determined region in a storage , such that a database for the use history of the user is generated by accumulating the determined regions, perform a control function corresponding to the region gazed by the user , and adjust a size of each of the plurality of regions based on the use history of the user according to how many times the user gazes at the respective regions such that a region frequently gazed by the user is enlarged in size. <EOS>