The trading number of used car in Taiwan has first overpassed the selling of new car since 1995. Over the past ten more years, the used car market has been growing rapidly and is now far beyond the new car market. The trading number of used car was up to 905 thousand in 2005 and was twice as many as the new car selling recently, which arose the highly concern of car companies on the used car market. In early times, the used car market had many trading arguments with the problem of asymmetric information under the poor law systems, which couldn’t guarantee the customers’ rights. It’s of difficulty to keep good quality management because the quality management of the used car stores was unsteady and there was no official certified organization in this field. Few dishonest used car stores just cared about their own benefits but not the customers’ rights. They ignored the security, sold abnormal cars illegally, which resulted in the customers’ distrusted about the used car stores. Recently, many car companies were involved in the management and development of used car market. This thesis aimed to study and analysis for the current new business model such as used car store alliance, certified pre-owned car and auction market in order to find the pros and cons, of these business models. This thesis tried to find some new opportunities and competitive strategy from current business models for future development of used car market.