The prob- lems of harmonious relationship between public interest and personal interest are the key to build a harmonious society.

Accordingly, personal interest prohibits knowledge sharing while personal efficacy promotes knowledge sharing.

In face of the divergent definitions of public interest,it is a must to extract the basic elements and reveal their relationships between public interest,governmental interest and personal interest in order to grasp the gist of public interest.

It also introduces Deng Xiaoping′s creative construction of the theory which studies human beings from concrete and historical viewpoint and which attaches importance to individual benefits.

On the other hand,it should be integrated with laws,govermmental means and economic work to make people achieve their individual benefits by lawful means.

The paper tries to make a brief analysis of debates on the definition of public interests,the relationship between public interests and personal interests,and the relationship between public interests and government interests.

personal interests, personal freedom vs.

The criminal law should protect the personal interests of the copyright owner and at the same time gives consideration to both state an.

Absence of identification of Public Interest in litigation gives rise to a large amount of cases of infringing on individual interest, in the field of urban house demolition in especial.

It is known that discretionary process refers as interest selection from comparison of the public interest with individual interest,and balance of the public interest in the enforcement of administrative power,therefore,the definition of public interest can be clarified.

The paper expounds the great importance to safeguard reasonal individual interest in market economy,puts forward practical protective measures and,at the same time,points out the rationality and appropriacy in pursuing individual interest.