Recently, multimedia in information society are renovating the methods of creating, communicating, and delivering information between people. Due to the rapid technological development of storing information through a digital network structure and a renewal on-line system, we cannot solve current various problems related to copy rights under our present law system. This study will find out a concept of copy right in digital media, introduce a relationship between the characteristics of multimedia and the copy right environment and analyze international trends in protecting copy right of digital media. Finally, the some problems and suggestions will be summarized to give new directions to using the copy right challenging in 21 century.