A method for replacing a background in a picture, comprising: acquiring (301, 501) a basic background image of a preset scene, wherein the basic background image is an image obtained by shooting the preset scene in advance; acquiring (302, 502) a captured picture obtained by currently shooting the preset scene, and determining a current background image of the preset scene according to the basic background image and the captured picture; and replacing the current background image in the captured picture with a preset background image to obtain a final captured picture; wherein the determining the current background image of the preset scene according to the basic background image and the captured picture comprises: extracting basic feature point information of the basic background image, and extracting shooting feature point information in the captured picture; and determining a matching relationship between each piece of the basic feature point information and each piece of the shooting feature point information, and determining the current background image in the captured picture according to the matching relationship; wherein the determining the current background image in the captured picture according to the matching relationship comprises: determining a positional corresponding relationship between the basic background image and the captured picture according to the matching relationship, determining a background portion in the captured picture according to the positional corresponding relationship, stitching the background portion in the captured picture and the basic background image to determine the current background image of the preset scene in the captured picture. acquiring (301, 501) a basic background image of a preset scene, wherein the basic background image is an image obtained by shooting the preset scene in advance; acquiring (302, 502) a captured picture obtained by currently shooting the preset scene, and determining a current background image of the preset scene according to the basic background image and the captured picture; and replacing the current background image in the captured picture with a preset background image to obtain a final captured picture; wherein the determining the current background image of the preset scene according to the basic background image and the captured picture comprises: extracting basic feature point information of the basic background image, and extracting shooting feature point information in the captured picture; and determining a matching relationship between each piece of the basic feature point information and each piece of the shooting feature point information, and determining the current background image in the captured picture according to the matching relationship; wherein the determining the current background image in the captured picture according to the matching relationship comprises: determining a positional corresponding relationship between the basic background image and the captured picture according to the matching relationship, determining a background portion in the captured picture according to the positional corresponding relationship, stitching the background portion in the captured picture and the basic background image to determine the current background image of the preset scene in the captured picture. extracting basic feature point information of the basic background image, and extracting shooting feature point information in the captured picture; and determining a matching relationship between each piece of the basic feature point information and each piece of the shooting feature point information, and determining the current background image in the captured picture according to the matching relationship; wherein the determining the current background image in the captured picture according to the matching relationship comprises: determining a positional corresponding relationship between the basic background image and the captured picture according to the matching relationship, determining a background portion in the captured picture according to the positional corresponding relationship, stitching the background portion in the captured picture and the basic background image to determine the current background image of the preset scene in the captured picture.