A computer-implemented method for processing brainwave signals of a user as acquired by a brain-computer interface, abbreviated to BCI, system, said BCI system comprising an electroencephalography, abbreviated to EEG, device, said method comprising the steps of: in a rest state: measuring via the EEG device a steady-state visual evoked potential, abbreviated to SSVEP, corresponding to an Oz electrode channel according to the brainwave signals; in a stimulating state, while a plurality of visual stimuli are displayed at a display: measuring via the EEG device the SSVEP of the Oz electrode channel according to the brainwave signals and determining whether it is greater than a threshold based on the rest state SSVEP measurement; measuring via the EEG device the SSVEPs respectively corresponding to an O1 electrode channel and an 02 electrode channe according to the brainwave signals when in the stimulating state; and determining a direction of a glance attention of the user according to the SSVEPs of the O1 electrode channel and the SSVEP of the 02 electrode channel (414, 416); wherein the determination of the glance attention of the user is used to determine and activate a command corresponding to one of the plurality of visual stimuli; wherein the step of determining the direction of the glance attention according to the SSVEPs of the O1 electrode channel and the SSVEP of the 02 electrode channel (414, 416) comprises: when the SSVEP of the Oz electrode channel is greater than the threshold, determining whether the SSVEP of the O1 electrode channel is greater than the SSVEP of the 02 electrode channel to determine the direction of the glance attention of the stimulus source. measuring via the EEG device a steady-state visual evoked potential, abbreviated to SSVEP, corresponding to an Oz electrode channel according to the brainwave signals; in a stimulating state, while a plurality of visual stimuli are displayed at a display: measuring via the EEG device the SSVEP of the Oz electrode channel according to the brainwave signals and determining whether it is greater than a threshold based on the rest state SSVEP measurement; measuring via the EEG device the SSVEPs respectively corresponding to an O1 electrode channel and an 02 electrode channe according to the brainwave signals when in the stimulating state; and determining a direction of a glance attention of the user according to the SSVEPs of the O1 electrode channel and the SSVEP of the 02 electrode channel (414, 416); measuring via the EEG device the SSVEP of the Oz electrode channel according to the brainwave signals and determining whether it is greater than a threshold based on the rest state SSVEP measurement; measuring via the EEG device the SSVEPs respectively corresponding to an O1 electrode channel and an 02 electrode channe according to the brainwave signals when in the stimulating state; and determining a direction of a glance attention of the user according to the SSVEPs of the O1 electrode channel and the SSVEP of the 02 electrode channel (414, 416); wherein the determination of the glance attention of the user is used to determine and activate a command corresponding to one of the plurality of visual stimuli; wherein the step of determining the direction of the glance attention according to the SSVEPs of the O1 electrode channel and the SSVEP of the 02 electrode channel (414, 416) comprises: when the SSVEP of the Oz electrode channel is greater than the threshold, determining whether the SSVEP of the O1 electrode channel is greater than the SSVEP of the 02 electrode channel to determine the direction of the glance attention of the stimulus source.