Library security fire door system

The invention discloses a library safety fire door system. The library safety fire door system comprises a power source and an alarm mechanism, wherein the alarm mechanism is connected with the powersource through a total wire; the alarm mechanism comprises an alarm switch, an alarm light and a buzzer which are connected in series by a branch wire, and the alarm light and the buzzer are disposedat a total station; a key groove is formed in the wall of the indoor side of a fire door in a recessed mode, and a key hook for hooking a fire door key is arranged at the key groove position; and a glass cover is arranged at the groove opening position of the key groove, a switch groove is formed in the groove bottom of the key groove in a recessed mode, and the alarm switch is arranged at the switch groove position. According to the library safety fire door system, the time of staff travelling to and from the total station and waiting at the total station to look for the corresponding fire door key is saved when a fir