The invention discloses a dormitory management method based on a weight sensor, and the method comprises the following steps: 1, the human body information of a bed in real time in a set time is acquired through a human body sensor, and the human body information is transmitted to a control module; 2, the control module transmits the human body information to a server, and if the server continuously receives the human body information within set time, the bed is a human body; 3, when the control module receives the human body information, the weight information of the bed is collected in realtime through a weight sensor, and the weight information is transmitted to the control module; step 4, the control module transmits the weight information to a server; and the server performs statistics to generate a current weight change table, the weight average value of the current weight table is compared with the weight average value in the weight change table generated last time, and when the difference between the current weight average value and the weight average value generated last time does not exceed a preset value, the bed is judged to be a corresponding student. Management personnel can conveniently judge whether the bed is a corresponding student or not.