A method for achieving a self-adaptive surround sound, characterized in that the method comprises: recognizing specific positions of a room and a user in the room by using an object recognition technology, capturing focusing images of recognized objects by controlling a camera using a focusing control technology, and recording corresponding focusing parameters; said specific positions of the room comprising a left corner, a right corner, a midpoint on the left floor-wall boundary, and a midpoint on the right floor-wall boundary, wherein the midpoints on the floor-wall boundaries are the midpoints on the part of the floor-wall boundaries that appear in the focusing images; calculating position information of the room relative to the camera and calculating position information of the user relative to the camera according to the captured focusing images and the recorded corresponding focusing parameters; calculating paths of sound beams that can achieve the surround sound at the position of the user in said room according to the calculated position information of the room relative to the camera and the position information of the user relative to the camera and a relative positional relation between the camera and a loudspeaker array; determining parameters of a filter group of the loudspeaker array according to the calculated paths of the sound beams, and adjusting the filter group of the loudspeaker array using the parameters; playing an audio signal via the loudspeaker array after the audio signal is filtered by said filter group that has been adjusted according to the parameters to form surround sound at the position of the user in said room; said calculating position information of the room relative to the camera comprises: calculating object distances of the left corner, the right corner, the midpoint on the left floor-wall boundary, and the midpoint on the right floor-wall boundary from the camera and angles of the left corner, the right corner, the midpoint on the left floor-wall boundary, and the midpoint on the right floor-wall boundary relative to a central axis of the camera lens, and calculating an equation of the left floor-wall boundary, an equation of the right floor-wall boundary and an equation of opposite floor-wall boundary, wherein the opposite floor-wall boundary refers to the floor-wall boundary opposite to the loudspeaker array and the camera. recognizing specific positions of a room and a user in the room by using an object recognition technology, capturing focusing images of recognized objects by controlling a camera using a focusing control technology, and recording corresponding focusing parameters; said specific positions of the room comprising a left corner, a right corner, a midpoint on the left floor-wall boundary, and a midpoint on the right floor-wall boundary, wherein the midpoints on the floor-wall boundaries are the midpoints on the part of the floor-wall boundaries that appear in the focusing images; calculating position information of the room relative to the camera and calculating position information of the user relative to the camera according to the captured focusing images and the recorded corresponding focusing parameters; calculating paths of sound beams that can achieve the surround sound at the position of the user in said room according to the calculated position information of the room relative to the camera and the position information of the user relative to the camera and a relative positional relation between the camera and a loudspeaker array; determining parameters of a filter group of the loudspeaker array according to the calculated paths of the sound beams, and adjusting the filter group of the loudspeaker array using the parameters; playing an audio signal via the loudspeaker array after the audio signal is filtered by said filter group that has been adjusted according to the parameters to form surround sound at the position of the user in said room; said calculating position information of the room relative to the camera comprises: calculating object distances of the left corner, the right corner, the midpoint on the left floor-wall boundary, and the midpoint on the right floor-wall boundary from the camera and angles of the left corner, the right corner, the midpoint on the left floor-wall boundary, and the midpoint on the right floor-wall boundary relative to a central axis of the camera lens, and calculating an equation of the left floor-wall boundary, an equation of the right floor-wall boundary and an equation of opposite floor-wall boundary, wherein the opposite floor-wall boundary refers to the floor-wall boundary opposite to the loudspeaker array and the camera.