An electronic apparatus includes a display, a communication interface, a memory comprising at least one instruction, and a processor configured to execute the at least one instruction, and the processor, by executing the at least one instruction, is configured to, based on an external user terminal being discovered through the communication interface, control the display to display a marker including at least one of a text or an image for guiding an operation of a user to establish a communication connection with the external user terminal, based on authentication on the electronic apparatus being performed by capturing the electronic apparatus outputting the marker by the external user terminal, receive a signal confirming authentication on the electronic apparatus from the external user terminal, and establish a communication connection with the external user terminal in response to the signal.