the rfid tag 10 an acceleration sensor 102 and a magnetic field sensor 104 as shown in fig2 accordingly when the wearer 39 s status is abnormal for example the wearer falls and the instant variation of sense signals exceed threshold values the monitor apparatus transmits a warning signal to a monitor end 2 along with identification id of the wearer and a wireless positioning location id of the monitor apparatus 1 thus the monitor end 2 is provided with sufficient information to send support persons to the wearer 39 s end immediately to proceed to following confirmation and provide first aid for the emergent incident fig2 illustrates block diagrams of a preferred embodiment according to the present invention as shown in the diagram the preferred embodiment is implemented by a monitor apparatus 1 having a rfid tag 10 installed inside the rfid tag 10 the main component of the monitor apparatus 1 comprises an acceleration sensor 102 a magnetic field sensor 104 a micro controller 106 a memory 108 and a radio frequency module 110 the micro controller 106 is electrically connected to the above components the radio frequency module 110 is further electrically connected to a radio frequency antenna 120 the rfid tag 10 transmits generated signals via the radio frequency antenna 120 to the monitor end 2 the monitor end 2 receives the signals in addition to the above components the rfid tag 10 further comprises a battery 112 as internal power provided to components installed in the rfid tag 10 when the rfid 10 does not transmit and receive signals with.