To activate an emergency system by monitoring a schoolchild, etc. on a school route, etc. and promptly obtaining information of the schoolchild, etc. when he or she deviates from the predetermined route.

A monitoring system MS includes a plurality of monitoring units M, disposed along a predetermined route, and each having a predetermined communicating area, and portable phone terminals P for either issuing an alarm or notifying a communication terminal unit in a monitoring center C, etc. when a signal reception sequence from the plurality of monitoring units is different from one recorded in advance in a memory means. A second monitoring unit S0 having a predetermined service area is installed at the start point of the predetermined route, thereby transmitting a signal that indicates communication interruption, when the communication with the above portable terminal unit is interrupted in the predetermined service area, to the communication terminal unit in the monitoring center C, etc. Preferably, the portable terminal unit includes an automatic position detection means by GPS signals, and transmits position information to the communication terminal unit, at predetermined time intervals.

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