The internet has greatly enriched and changed people\'s life,but it also has brought a lot of legal issues,as the copyright infringement liability of the on-line service provider has been a key point for the recent years.

By comparative studies of liability of the network practitioner at home and abroad,it is suggested that network contend providers are strictly held responsible for liability, while network owners should take joint and several liabity and network service providers should bear limited responsibility.

The adoption of a national law on the definition of electronic signatures, e-lectronic signatures and certification body,and network service providers responsibility can provide some enlightenment for our electronic signature legislation.

The status of internet service providers in copyright law depends on the functions of their internet service providers in the internet.

The development of internet digital technology brings about constant disputes between copyright owners and the internet service providers.

After over ten years of development, about the P2P Internet service providers’indirect infringement, the foreign countries, particularly the United States and European Union, have done systematic research and formed relatively perfect legislation and management mechanisms.

Comments on Tort Liability of Copyright of Internet Service Provider and Relative Rules in Regulation on the Protection of the Right to Network Dissemination of Information;

A Study of the Copyright Infringement on the Internet of the Internet Service Provider;

Study on the Tort Liability of Internet Service Provider;