The instrumental value is reflected in the auxiliary role of criminal procedure law in realizing fairness and justice, such as improving the efficiency of criminal proceedings, reducing the error rate of criminal proceedings, etc. It reflects the realization of The protection or optimization function of criminal law. The independent value embodied in the criminal procedure law directly affects the realization of the value of criminal law, such as the principle of acquittal, which is based on the requirements of procedural justice. In the case of acquittal, it directly eliminates the opportunity to apply criminal law to individuals. So my humble opinion is: instrumental value changes the original fairness and justice from a stick to a good stick. The so-called independent value means that it can directly create a unique kind of fairness and justice.