The bid-ask spread, market depth and volatility were used as the proxy variables of the market transaction quality in this study. All the intraday transaction data of TWSE stocks (Include Foreign Issuers) from 2011 to 2013 were used to examine the relationship between the stock market matching time and the market transaction quality. The results revealed that shortening the stock market matching time could obviously reduce the bid-ask spread increase the market depth, and could therefore improve the market transaction quality. To increase the volume and turnover rate of the stock market and to follow the trend of global stock market, the matching time is aimed to become real time and the matching time is estimated to become 5 seconds at the end of 2014. According to results of this study, we conclude that the market transaction quality will be further improved as the matching rate further increased.