Information technology has become an important part of human life in twentieth century. It not only brings great changes for individuals but the operation of an organization as well. Take government for example, use of this technology indeed makes operation of administration become more rapidly and conveniently. Besides, it also raises the quality of the services it supplies. Therefore, behind these advantages, it also brings some crisis. Due to the interaction of information systems, the information privacy of the public may be invaded. This paper would like to go further discussion of the following two points. One is the definition, origin, and the theory and practical analysis of protection bases of information privacy. The other is to give an example of IC Card which is planned by the Research, Development and Evaluation Commission of the Executive Yuan, and by this issue, we will try to exam the arguments of information privacy cause by it.