In e-commerce based on Internet, at first, people mainly make daily “business correspondences” by e-mails, and then release information by Internet. Since 1995, enterprises have gradually turned to Internet to release information. Therefore, the public can directly access to the enterprise information, goods and services by Internet, which leads to the exploration of information issuing system represented by the technology of Web and becomes the principal application of Internet. E-commerce Demonstration Law, passed by United Nations Commission on International Trade Law on June 14, 1996, symbolized the beginning of real e-commerce. And the sonorous advertisement of IBM in 1998 Are You Ready for e-commerce set up the upsurge of e-commerce all over the world.