本研究以中國2000年至2007年間滬深上市公司為樣本，分析保薦制度對於企業在現金增資（在本研究中包含增發與配股）後經營績效的影響，其中經營績效包括稅後淨利成長率、股東權益報酬率成長率與每股盈餘成長率為衡量指標。實證結果顯示，現金增資後企業的經營績效有明顯衰退的現象，但是本研究發現這個經營績效惡化的現象在保薦制度後有顯著減緩的證據。最後，若將企業細分為增發與配股，進一步的分析顯示，保薦制度的效果在配股樣本中得到顯著結果。彙總而言，實施保薦制度能夠有效減緩企業現金增資後經營績效衰退的情形，且該效果在配股企業較為明顯。 / This study examines the impact of Sponsor’s System on operating performance of firms conducting Seasoned Equity Offerings from 2000 to 2007 in China. The performance measures include the growth of net income, the growth of ROE, and the growth of EPS. The empirical results indicate that there is significant decline in post-SEO performance. However, the phenomenon of poor performance after SEO is less severe after Sponsor’s System. In conclusion, the employment of Sponsor’s System can relief performance decline after SEO.