The utility model discloses a library study room seat manager, which belongs to the electronic equipment. The library study room seat manager is composed of a central processor, a pyroelectric infrared sensor, a digital keyboard, a display, screen, and an indicator light and characterized in that: the infrared ray released from human body is received by the pyroelectric infrared sensor to judge whether a person sits on the seat or not, and according to the input information such as the input digital number when the person leaves, the input information is processed by the central processor to judge whether the seat is allowed to be used by a subsequent person or not, and the judgment result is displayed on the display screen and the state of the indicator light is output outwards. The device can be widely used in the library study room and can prevent the seat occupancy, realize the management autonomy of the seat in the library and improve the use efficiency of the seat.