WebP is a new image compression technology proposed by Google. It is derived from the VP8 video coding format; it also supports lossless and lossy compressions. Compared with the present popular image format, WebP has smaller volume than JPG and PNG in the condition of the same picture quality conditions. By coding with MATLAB, this experiment adopts the PSNR and SSIM on WebP and JPG, PNG for comparison test, then implement data compression and reduction test. Since MATLAB does not identify the WebP format, this experiment uses canvas to process WebP images, thus measuring the PSNR and WebP of SSIM. The results of experiment show that WebP has high value in the life, it will develop well in the future.