Based on the data of A-share listed companies, this paper examines how managerial network affects audit opinions and audit fees. We find that firms with greater managerial ties are more likely to receive modified audit opinions and afford more audit fees. Considering the legal environment as a moderator, further study finds that stronger is the legal system, stronger is the positive correlation between the managerial network ties and the possibility of receiving modified audit opinions and audit fees. This paper examines the influence of legal system as a formal institution of firm audit characteristic, and also as informal institution of managerial network, that provides the reference for government regulation and corporate governance optimization.