She goes to the library room to study every day after school.
Tips
usage
Distinguish from 图书馆 (túshūguǎn): 馆 implies a full standalone library building, while 室 is a single room - typical at workplaces, schools or community centers. So 学校图书馆 = school library (large), 教室隔壁的图书室 = the reading-room next door.
