Image enhancement results were often assessed by subjective evaluation and the assessment could not be quantitative and objective. A new method of objective evaluation for image enhancement based on BRISQUE and JND was presented. The BRISQUE distortion score and JND visual score were performed in the spatial domain, and the score obtained by the weighted total score of 0.5 would be the objective evaluation score of the post image. In order to verify the effectiveness of the proposed method, a series of experiments were carried out. Firstly, to certify image distortion with same background brightness by increasing BRISQUE value, the visual JND value was changed accordingly; Secondly, to certify with the same background brightness of the same JND value of different distortion images, the BRISQUE values were different. Finally, the evaluation of enhanced image based on the proposed algorithm achieved the highest score of 0.790 5, and the result was consistent with subjective evaluation results. While PSNR, SSIM score was the highest of infinity and 1, both were compared with the original image, which could not show the effect of image enhancement. It showed that the proposed algorithm could objectively evaluate the image enhancement.