The invention discloses a library study room seat manager, and belongs to electronic equipment. The library study room seat manager is composed of a central processing unit, a pyroelectricity infrared sensor, a numeric keyboard, a display screen and an indicator lamp. The library study room seat manager is characterized in that whether people sit on a seat is judged due to the fact that the pyroelectricity infrared sensor senses infrared rays released by the human body, whether the seat is allowed to be used by follow-up people is judged according to digits and other input information input by the leaving people when the leaving people leave and processed by the central processing unit, and results are output outwards through display of the display screen and the state of the indicator lamp. In addition, the invention further discloses a using method of the library study room seat manager, the library study room seat manager can be widely used for library study rooms, seat occupying is prevented, seat management autonomation of a library can also be achieved, and seat using efficiency is improved.