A set of navigation system of smart car based on the dual S08 microchip was designed to provide navigation data for the smart car. The navigation system uses two low-price 8bit microchip to replace traditional high performance 16bit microchip which could deal with the multi-event simultaneously, and realizes the function to store the image data automatically. The result approves its validity and reliability. On the other hand, it also provides us with a new low cost way of collecting image information.