介绍了出租车计费器系统的组成及工作原理，简述了在EDA平台上用单片CPLD器件构成该数字系统的设计思想和实现过程。论述了车型调整模块、计程模块、计费模块、译码动态扫描模块等的设计方法与技巧。-Introduced a taxi meter system, the composition and working principle outlined in the EDA platform, with the single-chip CPLD devices constitute the digital system design idea and implementation process. Discusses the models to adjust module, the meter module, billing module, decoding module and so dynamic scan design methods and techniques.