Apparatus for preventing escape, monitoring system using it and method thereof

The device, monitoring system and a monitoring method using the same for preventing escape of the invention is disclosed. Device for preventing escape of the present invention comprises a body portion consisting of a pair to be symmetrical to the wrist straps of the suspect or the suspect; One pairs with guseongneun moving ring coupled to the body portion is symmetrical so as to rotate about the one end; And is provided in the inner or outer parts of the body, entitled to receive the palm of the suspect or the suspect status, or by detecting whether or not the specified distance leaving workers and an auxiliary means for outputting a warning sound or the control signal according to a result of the detection.