An electronic device according to an embodiment may include a display; a first camera and a second camera mounted at different positions with respect to a screen of the display; a sensor; and a processor operatively connected to the sensor, the plurality of cameras, and the display, wherein the processor may be configured to acquire state information according to a change in state of the display based on a detection signal of the sensor, to control the first camera and the second camera to acquire a first image from the first camera in real time and a second image from the second camera in real time, to generate a third image by synthesizing the first image and the second image based on the state information, and to display at least a portion of the third image as a preview image on the display in real time.