Fuzhou college of foreign studies and trade dormitories generally use the "smart bathroom" APP to take a bath. This APP can log in by scanning the QR code or entering the room number and password, and then select the corresponding bathroom to make an appointment. When using, you need to put the mobile phone near the sensor at the door of the bathroom. After turning on the faucet, the APP will automatically start timing, and when the time comes, it will automatically stop the water flow. Using this APP can effectively avoid too much water and too long time in the bathroom, which is convenient for students to manage their own water use behavior.