These days, many CCTVs are installed almost everywhere such as elevators, schools, buses, subway stations, and so on. Also, for preventing criminals, CCTVS are installed in the roads. Actually, my town has a CCTV every two blocks. Officers said, “It is for you, because it helpful for eradicating criminals.” However, how much CCTVs can really prevent offense? I think, it is useful for just collecting evidence for proving guilty. About ten years ago, people wanted roadlamps for security, but now, people want to intall CCTVs in dark road. I don’t know why this situation happens.  A few days ago, shocking incident occred in English town that has many CCTVs all the corners. In spite of CCTVs, a teacher committed disgraceful conduct to a student, and nobody knew that because any guard watched many TVs carefully. CCTV is losting its worth, people have to other alternative plans for security about horrible criminal and private life.