The purpose of this research is to develop an easy use and multi-function alternative input device. After all kinds of considerations as well as actual case studies and analysis, we use the embedded system as the hardware platform. We also add some self-made hardware equipments to achieve the designing demand. While trying to meet different users’ need, we develop an editor software to enable users to edit their own keyboard layout. We expect the alternative input device developed from this research should let the users to use only one key touch to complete all needs of a function, and reduce the gap between handicapped users and computer. Finally, it will bridge the digital divide between handicapped users and common users.