This study focuses on the electronic monitoring system on sex offenders. The electronic monitoring system was introduced to prevent any recurrence of sexual abuse of those who are highly probable of committimg crimes again. The system is effective in that it satisfies the desire to punish criminals, relieves the overpopulation of reformative institutions and results in the social-defense.The Correction Program is a non-custodial sentence or a means of substituting punitive measures which covers probation, parole, supervised release, community service, and attendance center order. The Protective Supervision System’s special case clause that prohibits the sentence of electronic anklet and probation to sexual offenders should initially be deleted. The electronic monitoring system uses satellites to track offenders. Each offender wears an ankle bracelet and carries a wireless positioning device that periodically transmits the location of the offender. If the offender tampers with the positioning device or enters a prohibited area, the device electronically alerts authorities. With GPS tracking, the monitoring system can identify the location of any given offender at any given moment.This system is adopted to sex offenders in Korea since 2007. However, in the purpose of crime prevention there is a legal disposition similar to that of probation in the Legal System. The laws are intended to place tougher restrictions on convicted sexual predators. The laws are also intended to protect children from sex offenders, However, there is concern that the constitutional rights of offenders might be violated. For example, the electric monitoring could infringe on an offender's rights to privacy and equality. This system will be functioned only as a security-measure. Sex offenders with electric monitoring system will be restricted in their freedom and citizens will be safe from criminal danger.