From the theoretical and practical angle, this article systematically analyses the universalfeasibility 、copyright attribute of the licensing use of the digital information resources andrelevant problems;This article emphatically elaborates the employing condition and existedproblems of two kinds of the digital information resources: integrated digital informationproduct and single digital works.

Study on the building the Use andProtective System of Digital Works;

Digital watermark──a new trend in digital works copyright protection;

Study on Technological Measures for Protecting Intellectual Property Right of Digital Works;

This essay has narrated the traits of lawfulness and present significance of numeral works copyright under collective administration.

In this paper,the author discuss some principles and the necessity of applying numeral works properly.

The main thing that should be considered to protect the copyright of numeral works is a series of effective protecting strategies.

However, digital work has fatal inefficiencies obviously.

Firstly,it is the problem of digitalization of works,which is the logical starting-point of analysis in development of dupl.

The author tries to make an introduction on the protection of digital works copyright on Internet through the angle of protected object and the violators, and proposes countermeasures on law.