Criminal Policy of Combining Punishment with Leniency is a basic criminal policy under the background of constructing harmonious society and the international criminal policy tide of polarization.

If the purpose of penalty realizated,the implementation of the penalty of prison which have been guided with the criminal policy of temper justice with mercy has reconciled.

It is significant for the development and judicial practice of rule of criminal law to properly interpret the criminal policy of temper justice with mercy.

With the vision of the Criminal Policy of Temper Justice with Mercy, this text made thorough analysis and study to the Juvenile Criminal Justice System of our country with tiny view and macro view.

Implementing the criminal policy of temper justice with mercy,handling properly the criminal cases of letters and calls involving the law and prosecution will help to establish a better atmosphere that the governments administrate by law and the judicial departments handle cases in conformity with the legal provisions.

The quality index of public prosecutional case can enhance the cases quality and enforce the temper justice with mercy policy.