As an important means of promoting realization of harmonious society,modern criminal legality is based on the principle of a legally prescribed punishment for a specified crime,sticking to rational ideas for punishment,so as to realize values of justice and equality.

On the human rights guarantee by the rule by law criminally;

In the meantime of understanding of its technical reasonableness,we should be on the alert for its negative aspects and reveal the deep and interactive mechanism between criminal law and ethics from a development.

Modesty of Criminal Law is the humility,yield nature of criminal law in the launch control,the delimitation of regulation and control,method choice of control and various aspects of criminal law.

For this reason,it leads to the co-existence of advantages and disadvantages on those aspects: the principle of suiting punishment to crime responsibility,the ethical and practical aims of punishment,even the whole criminal rule of law.

The development of criminal rule of law relies not only on a scientific,democratic and modernized criminal legislation,but also on an efficiently operated and feasibly guaranteed criminal justice.

Furthermore, the development of theory of penal laws to a large extent depends on a scientific view on penal policies.

The value of the modern criminal law is safety and justice.