本研究主要針對我國上市櫃輔導之制度，探討撤銷上市(櫃)輔導公司之中，獲准上市(櫃)之公開發行公司，與其他自願撤銷輔導上市櫃之公開發行公司相較，於撤銷輔導上市櫃之前二年至後二年的研究期間，兩者之間的盈餘品質是否存在差異。 實證結果顯示，以損失認列時效性迴歸模型分析時，獲准上市(櫃)之公開發行公司較自願撤銷輔導上市櫃之公開發行公司有較佳的盈餘品質；以盈餘時效性迴歸模型分析時，自願撤銷輔導上市櫃之公開發行公司較獲准上市(櫃)之公開發行公司有較佳的盈餘品質。本研究推論此分歧結果，由我國臺灣證券交易所股份有限公司有價證券上市審查準則與財團法人中華民國證券櫃檯買賣中心證券商營業處所買賣有價證券審查準則對於申請上市(櫃)之獲利門檻要求所造成。 / Based on regulations on listing guidance released by the Taiwan Stock Exchange Corporation (TSEC) mission, this study investigates the difference in earnings quality between firms that voluntarily cancel their listing guidance applications and firm that complete their initial public offerings (IPOs) over the period of two years prior to the cancellation and two years after the cancellation of listing guidance application. The results show that, under timeliness in loss recognition regression model, using a two-year duration prior to the IPO or listing guidance application cancellation for research period, the earnings quality of IPO firms over the two-year-period prior to their IPOs is better than that of firms voluntarily cancelled their listing guidance applications. On the contrary, under timeliness in earnings regression model, earnings quality of firms cancelled their listing guidance application voluntarily is better than that of the IPO firms. The empirical evidence thus suggests that the inconsistence on earnings quality measured in terms of loss and earnings recognition may due to the profitability threshold imposed by TSEC and GreTai Securities Market on rules governing the review of stock listings.