Electronic device, augmented reality device for providing augmented reality service, and method of operating same

An electronic device is provided. The electronic device comprises a touchscreen, a communication module, and at least one processor operatively connected with the touchscreen and the communication module. The at least one processor is configured to establish a communication connection with an augmented reality (AR) device using the communication module, transmit data for display of a first content to the AR device using the communication module, display a first user interface for controlling the first content on the touchscreen, transmit data for display of the first content varied by a first input received through the first user interface to the AR device using the communication module, transmit data for display of a second content different from the first content to the AR device using the communication module, display a second user interface for controlling the second content on the touchscreen, and transmit data for display of the second content varied by a second input received through the second user interface to the AR device using the communication module. Other various embodiments are possible as well.