This paper’s research object is Shanghai auto show, which was host on 2001-2015.Study the Co-integration relationship and Granger causality Preferential between numbers of exhibitors, numbers of displaying automobiles, numbers of participating countries and Shanghai automotive sales. The result show that: Shanghai auto show had a positive role in promoting Shanghai automotive sales. The factors of automotive sales including the number of exhibitors and the number of displaying automobiles in Shanghai auto show. One of the biggest elements on automotive sales was the numbers of exhibitors. As audience and potential consumers, it enhanced the Shanghai automotive sales through their own needs and information spread; the number of displaying automobiles marked the function and technical innovation of the exhibition. The more autos on display, the more consumer's shopping motivation be stimulated that promoting automotive sales increased.