An electronic device is provided. The electronic device includes a first camera, a second camera spaced apart from the first camera, and a processor. The processor is configured to obtain a first image of external objects using the first camera, obtain a second image of the external objects using the second camera, identify a specified object in which pieces of depth information are generated from among the external objects included in the first image and the second image based on phase difference comparison between the first image and the second image, then select depth information about the specified object among the pieces of depth information based on a degree of spreading of a point corresponding to the specified object included in at least one of the first image and the second image, and generate depth information about the external objects including the specified object using the selected depth information.