Beginning with the explanation of the juristic act according to traditional civil law,and based on the questionning on the legitimacy standard of the civil juristic act,and the legal intention declaration of setting up right should be regarded as the essential standard of the civil juristic act for our civil law.

Some authorities think the agreement of property right is the declaration of will of juristic act of property right.

So,being the basic element of the civil act of law,declaration of will plays a more and more role.

The characteristics of electronic declaration of will in electronic contract are introduced,as well as the impact of it upon the relevant systems of traditional contract law.

The author,based on the concept of civil justice act,proposes that legalization shall not be the necessary element of civil justice act while the emphasis should be placed on the declaration of will in legal acts as well as the pursuit of effects in private law.

Research on the Theory of Reliance Protection and Declaration of Intention Explanation;

As the core of the system of legal acts,declaration of intention is the basis of the effectiveness of legal acts,also the base point of the estimation of the value of the legal acts.

The conception of juristic act must include its core factor declaration of intention and therefore should be emphasized that it brings about private law effect,not as a kind of juristic fact,but as a kind o.

Concerning the defects of meaning expression in the network environment;

The constitution of meaning expression is one of the fundamental problems in the civil law.

Our country already has founded a relatively perfect legislation and a set of judicial interpretation rule about the meaning expression which is under the realistic environment.