This paper describes the design of a smart wheelchair with computer control systems. A short overview about wheelchair technology is explained with main parts of the system. This project also includes some evaluations and discussions of the smart wheelchair technology in the following pages. Some important considerations such as anthropometric, control, cognitive and environmental in wheelchair design are described in more detail. Furthermore, this project provides that the computer control system allows the chair user a safe, easy ride, and creates cognitive relation between user commands and actual trajectories.