An electron emission display device and a method of correcting an image signal to enhance an image quality by reducing luminance unevenness among pixels. The display device includes: a display region having an anode electrode configured to collide with electrons emitted depending on a voltage applied to first and second electrodes, the image signal being corrected using a correction factor; an image signal generator for generating the corrected image signal by multiplying the image signal by the correction factor to generate a result, dividing the result by a first number to generate a quotient and a remainder, and summing the quotient with a second number corresponding to a value of the remainder; a data driver for generating a data signal using the image signal and for transferring the data signal to the first electrode; and a scan driver for generating and transferring a scan signal to the second electrode.