Although the confession and punishment system is currently only written in the Code of Criminal Procedure Law, it is a comprehensive system, and its implementation cannot be separated from the support of criminal law. The article focuses on the meaning of "confessing guilty and accepting punishment" in the doctrine of criminal law, clarifying the overlap between confession and punishment and the existing wide-ranging reasons, and exploring the unique value of " confessing guilty and accepting punishment". It is pointed out that in addition to the reduction of the probationary punishment of the prosecuted, the pleading guilty plea also speeds up the circulation of the procedure and improves the efficiency of the judiciary. Therefore, it has the connotation of the system that has not been covered by the confession. At the end of the article, it is proposed: the criminal code should make a principled provision for confession and confession; the criminal law should clearly recognize the confession and punishment of the entity; the criminal law provides discipline support for the standardization and precision of sentencing recommendations.