The “Peng Yu case” reflects the social good faith crisis and the requirements for judicial integrity. The“applicability” of the principle of good faith on the conduct of the court and judge of Article 13, paragraph 1 of our“Civil Procedure Law” includes the indirect applicability in the sense of law declaration and the direct applicability in the sense of referee quotation: the former is sure but should not be abused, which the latter appears to be very beautiful but with limited functions. The judicial integrity requires due diligence trial according to law, the prohibition of raid trail and the abuse to discretion. The good faith principle of civil procedure has the functions of the orientation of judicial integrity, the integrity resolution of the trial conduct of Civil Procedure “system violates”, the integrity of the interests balance of the parties and the second discipline of dishonest conduct of the trial. By their very nature, judicial integrity is conscientious trail in compliance with due process and the method of applicability of good faith principle.