In a student dormitory of University of the scope of investigation, through the issuance of energy saving information card, the changes of electricity consumption in campus are observed.Comparative information is generated between the different cards, power consumption difference, saving cards issued were divided into four categories: overall ranking + average overall ranking, average and no cards.The influencing factors of students electricity consumption are analyzed from two view points of sex and grade, which provides a reference for environmental advocacy and electricity management in university.