The concept of information society is a powerful idea that has become an integral part of our lives. The power of the information society concept comes from the concept of information that impacts and changes the work patterns and life-styles of people. The purpose of this paper is to enhance our understanding of the impact of information society on people and its importance in terms of terrorism and counterterrorism activities. In this regard, different definitions of the information society concept and definitions of the terms information, society and terrorism are discussed. Then, development of society in terms of sciences and technologies is examined. In turn, how it has become an information society and its effects on terrorism and counterterrorism are explained.