The invention discloses an intelligent management system for a sliding window. The intelligent management system comprises a window closing mechanism, a sound decibel detector, a pressure detector, astorer, a controller and a control tool; the window closing mechanism comprises an electric cylinder; the sound decibel detector is used for detecting a sound decibel value; when a window sash is in aclosed state, the pressure detector emits a pressure detection signal; a noise threshold is preset in the storer; when the sound decibel value is greater than the noise threshold, the electric cylinder drives the window sash of the sliding window to be closed; and the control tool operates on a smart phone, a noise threshold setting module comprises a noise database and a selecting module, the noise database is used for storing a plurality of noise samples with different decibels, and the selecting module is used for defining the decibel of one of the noise samples as the noise threshold based on selection of the noise sample. The intelligent management system can automatically detect the outdoor sound decibel, automatically closes the window sash to reduce interference of noise to sleep,can further set the noise threshold through the smart phone, and is extremely convenient to use.