The invention discloses a method and a device for adjusting the volume of a window interphone, wherein a motion trail of a character is obtained and it is determined whether the character is in the service processing area according to the motion trail of the character; if it is determined that the character is in the service processing area, the volume of the window interphone is adjusted according to the noise volume in the environment so as to ensure the clarity of the sound of the window interphone during the talkback process, and to achieve the intelligence of adaptively adjusting the volume of the window interphone.