The electronic signature has the following legal functions: identifying the signer,proving the signer s admission to the contents of the electronic data,and guaranteeing the integrity and authenticity of the original documents.

Law of society thinks legal loophole is inevitable for law because of law being in the society,the dichotomy between legal ends and legal functions or uncertainty of rule,fact and legal method.

Discussion on water resources management science and law function;

The law function is the ability that law ought to have as a kind of regulator of social relation and can produce result to the social macroscopic system.

The function of law is diversified as it varies in purpose, scope and mode of law use in different society and times.

Based on the theoretical analysis of legal function, with the status quo of China\'s legal system, the article points out the legislative missing that has made the impact to the improvement of legal functions , explained the macro-innovation of system , that we need to build two types of static and dynamic society mechanisms for legal protection.