The aims of this study use the results of Information Transparency and Disclosure Ranking System to evidence the performance of the firms in Taiwan Stock Market. The empirical results indicate that using the panel data samples of firms listed on the Taiwan Stock Exchange (TSE) and Over The Counter (OTC) from 2005 to 2013, we significantly find the firms with more (less) transparent and the better (worse) performance after the ranking system result reports evidence from their Tobin’s Q and ROA. Furthermore, we examine and find the companies with positive implement the ranking indicate causes the more positive performance of our samples, significantly. There’re means the Information Transparency and Disclosure Ranking System ranking result can be refer to the firm performance, and the progress in companies’ disclosure significantly positive association with the value relevance of earnings.