Nowadays, a growing amount of devices are applied on the car, such as systems for navigation, audio, phones, and driving assistance systems. Car interior function systems will get more and more complicated in feature, which require more attention and increase more work load [1]. This paper aims to describe how to design switches of vehicle operation and control system for enhancing the performance of drivers. Therefore, we conducted an interview of Chinese drivers about the problems with their car to explore the advantages and defects of the current interior design. In the paper some cases were analyzed by applied semiotics theory, to discover how to make the manipulation in in-vehicle easy to understand and use for users. To design easy to-use interface, this essay identifies key principle of designing car switches on the Basis of Semiotics, their features, and problems. In the content, we aim to appeal construct design criterion that could be used to direct later car switches systems.