The invention provides a passive
smart lock system, comprising a background
system, a
mobile phone and an electronic lock, wherein the electronic lock is arranged on a door of a locked object. The passive
smart lock system is characterized in that the
mobile phone and the electronic lock are provided with NFC (
near field communication) chips; the electronic lock also comprises a control
chip, an
electromagnetic valve, a power supply device and a spring bolt; each NFC
chip controls the
electromagnetic valve through the control
chip; the
electromagnetic valve controls the spring bolt; the background system is provided with a
signal output end for transmitting a
signal to the
mobile phone, and is also provided with a
signal receiving end for receiving the signal from the locked object; each lock is provided with the NFC chip, so as to achieve identity
authentication of each lock. The problems of overlarge number of keys, easy duplication of the keys, difficult key transmission, absence of authority differentiation in an unlocking process, absence of an unlocking
record and the like are effectively solved; the passive
smart lock system can remotely authorize. Therefore, an effective technical means is provided for strengthening personnel
access management and equipment operation management, and improving the work efficiency.