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At present, because of the diversity of mobile devices and low bandwidth network, traditional internet application can not work efficiently on mobile devices. For example, it is very slow to download images from internet to a mobile phone. In order to overcome this problem, we propose a new method to design a wap application gateway based on embedded block coding with optimal truncation (EBCOT), which can modify images adaptively according to different types of mobile phones. Therefore we can quickly browse images with a mobile phone even in a low-bandwidth network.