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To protect workers (specifically, a part-timer) working at midnight from violent crimes, provided is a system in which a time (from 10 p.m. to 5 a.m.) is set to control a visitor (with an automatic lock device) and store an image by using a face recognition camera attached to an entrance door, by which a criminal is caught with the image (the criminal′ s face) photographed by an instant camera when a problem occurs. Due to an installation of the system, the criminal knows that the face is exposed at the time of coming, and does not access (abandoning a criminal plan), so the workers can work with their mind at ease (the greatest fear of part-timers is violent crimes).(AA) Operation system diagram(BB) Visitor(CC) Success in face recognition(DD) Failure in face recognition(EE) Transmitting a voice(FF) (at the time of wearing a mask, sunglasses and a cap)(GG) (please take off the mask, the sunglasses and the cap)(HH, KK, MM) Entrance success (approval)(II) Face recognition(JJ) Re-transmission(LL) No admissionCOPYRIGHT KIPO 2015