In computer multimedia technology, a system, method and computer program product for optimizing images and transmission of images of a web-page transmitted over the Internet and furthermore, optimizing images of a web page on a network server. The method includes detecting the images in the web page to determine the relationship among the images; in response to the determination of the relationship among the images, combining two or more related images into a combinational image; and updating the web page to replace references to the related images with a reference to the combinational image. By optimizing web page images, the server's work required for handling heavy amount of HTTP requests in transmitting the web page images is decreased and the bandwidth requirement for transmitting the web page images is reduced. The quality of the original image is not lowered. And there is no need to make any change to the operation at the client side.