This paper discusses the content of moral regulation in network information behavior,analyzes the different functions of information morality,information law and information technology,then advances some suggestions on the construction of morality of network information.

The so-called information competence is a kind of information character and internal ability developed with the integration of information sense, information morality, information ability, information psychology and information potentials.

This paper generalizes the definition and characteristics of digital library s information ethics and demonstrates its function in the construction and development of digital library,the harms caused by the absence of information ethics,the reason,main contents of information ethics of digital library and the countermeasures.

It is one of the most important responsibilities for a library to educate its readers about information ethics.

This paper attaches much importance to librarian s information ethic construction in the environment of information and culture, and expounds the meaning of information ethics.