1. A system for notifying electronic anklet information comprising: an electronic anklet worn by an electronic anklet wearer; a smartphone for searching approach of the electronic anklet using an application installed in advance and receiving a notice regarding the approach; an application server to provide the application for searching the approach of the electronic anklet and receiving the notice regarding the approach upon request by the smartphone; a central monitoring server for conducting surveillance on and monitoring of a current location of the electronic anklet all day; and a communications network connecting the electronic anklet, the smartphone, the application server, and the central monitoring server and allowing communications therebetween, wherein the application is software installed on the smartphone displaying a text message on the smartphone, generating vibration, or outputting an alarm when the electronic anklet is within a reference distance.