Abstract: A projector color calibration device and a method thereof are provided. The device is installed in a projector, and comprises a photo detection component used to receive a color brightness value, an image signal processing unit used to process an image signal inputted to the projector and to store the processed image into a memory, and a central processor used to compare the color brightness value detected by the photo detection component with the image signal inputted to the projector and to perform color calibration for obtaining an accurate color output value. It is not necessary for a user to manually adjust the output color of the projector. Moreover, the optimum automatic adjustment can be accomplished to meet the requirements in different environments.