An electronic device and method are disclosed. The device implements the method, including: receiving an utterance using a microphone, obtaining an image using a camera, transmitting by communication circuitry the utterance and/or the image to a server, receiving from the server operational information based on the transmission, executing a task corresponding to the received operational information, wherein the operational information further causes display of a first screen including first objects at a first size, and a change of the first screen to a second screen, based on a user movement indicated in the first image, the second screen including second objects displayed at a second size different from the first size, and having a count different from a count of the first objects.