我國導入審計委員會制度主要目的是為了保障股東權益、強化董事會職能、發揮監察人功能、尊重利害關係人權益及提昇資訊透明度。但審計委員會是否具備足夠的能力與心力來增進公司治理是大家所關注的,但是,過去文獻較常以單一變數衡量審計委員會品質,這樣可能會導致忽略其他變數可能造成的影響,因此,本研究採用綜合指標來衡量審計委員會品質,以期能夠更全面的瞭解審計委員會品質的影響。本研究之主要目的乃在討論審計委員會品質與公司債務資金成本之關聯性,並進一步欲瞭解當聘任產業專精會計師時,若審計委員會品質較高,是否有助於降低債務資金成本。以2013年至2017年台灣已設立審計委員會之上市(櫃)公司為樣本。實證結果發現,雖然審計委員會品質較高時,債權人因為公司大都符合法規之最低要求而不願意信任企業,但在審計委員會品質較高並委任產業專精會計師之綜效下,債權人會因為產業專精會計師的聲譽與出類拔萃的查核技術而給予較高的信任與正面觀感,並更為信任公司的財務報表品質,因而有助於降低公司之債務資金成本,這樣的效果更顯著的發生在主副簽會計師皆為產業專精會計師的情況下。
The purpose of Taiwan introduction of the audit committee system is to protect shareholders' rights, strengthen the functions of the board of directors, operate the role of supervisor, respect the stakeholders, and enhance information transparency. Past studies use the size of the audit committee, whether the convener has expertise in finance (or accounting), the numbers of member with expertise in finance (or accounting) and expertise in corporate governance, frequency of meetings, and the attendance of members. We construct a comprehensive index to measure audit committee quality, and aim to comprehensively understand audit committee quality effect. We collect the data from publicly listed firms with audit committee from 2013 to 2017 to examine the interplay between audit committee quality, cost of debt, and the employment of an industry-specialist auditor. The result indicate that when hiring industry-specialist auditor, if the audit committee quality is high, it can increase the trust of creditors to reduce the cost of debt.