An eye detection method for detecting a degree of eye opening and closure of a testee includes detecting a location of an eye pupil, a location of an inner eye corner and a location of an outer eye corner of an eye of the testee； calculating an eye width according to the location of the inner eye corner and the location of the outer eye corner； multiplying the eye width by a specific ratio to obtain an eye height； generating a region of interest with a center on the location of the eye pupil, a length equal to the eye width, and a width equal to the eye height； and determining a ratio of the eye occupying a detection area in the region of interest, and determining the degree of eye opening and closure of the testee accordingly.
