Recently, voyeurism crimes have become more serious day by day due to the increased smartphone. The Internet has caused widespread damage, increasing public fears of voyeurism crimes. Accordingly, this study aims to look at the current status of voyeurism crimes and major recent cases of voyeurism crimes, and to identify major legal revisions related to voyeurism crimes, comprehensive government measures, and foreign voyeurism crimes provide effective countermeasures to prevent voyeurism crimes. Therefore, if individuals use toilets, accommodation facilities, or changing rooms, they need to find the spycam so that they can eliminate the fear of spycam or hidden cameras. It is necessary to develop devices that can detect the illegal devices. This prevents criminals from achieving their intended purpose even if illegal devices are installed, and rather, they are more likely to be arrested, and if arrested, they are subject to strict punishment to suppress potential criminals' motives. In other words, voyeurism crimes should be eradicated based on the theory of deterrence, which focuses on swift punishment, certain punishment, and strict punishment.