本文主要探討資訊不對稱對於公司現金持有及超額現金持有價值的影響,並加入集團企業及所有權結構,以了解資訊不對稱在各種公司型態對公司現金持有及價值的影響。本研究以2004年至2013年中國上市公司共12,680個觀察值,進行實證分析。實證結果顯示:在中國,資訊不對稱對於現金持有及超額現金價值皆會有負向的影響,顯示在外部治理機制較弱的國家,現金價值主要由代理問題驅動,使得外部投資人對公司所持有的現金產生疑慮,因而減少其現金持有並且降低其超額現金價值之評價;而加入集團企業的考量後,發現當公司屬於集團企業時,資訊不對稱對於現金持有及超額現金價值仍產生負向的影響,顯示集團內複雜組織結構所產生的資訊不對稱,加深投資人對公司現金持有的疑慮,再加上集團所形成的內部資本市場,使得投資人對於集團所持有的超額現金給予負向評價;最後在集團企業中加入所有權結構考量,發現不論是國家或私人持有之集團,資訊不對稱對於現金持有及超額現金價值仍產生負向的影響,顯示集團的組織形式對代理問題的影響支配了所有權結構對代理問題的影響。本文研究結果對資訊不對稱在新興資本市場的管理影響有重要貢獻。;This research investigates the relationship among cash holdings, value of corporate excess cash holdings and firm-specific information asymmetry. The sample contains the listed firms in China from 2004 to 2013 and obtains 12,680 firm-year observations. Our results support the free cash flow theory and indicate that information asymmetry negatively moderates the relationship between cash holdings and value of corporate excess cash holdings in China. We further divide the sample into group affiliated firms and non-group affiliated firms and find that the negative moderating effect exists in group affiliated firms. Finally, we take ownership structure into account and the negative moderating effect is found in both state-owned group affiliated firms and private group affiliated firms.The results in this study imply show that agency problem of free cash flow dominates the effect of information asymmetry in group affiliated firms.