An electronic apparatus comprising: a communicator; and a processor configured to: based on a first user voice received at the electronic apparatus and comprising a request to establish WiFi communication between an external electronic apparatus and an access point, transmit to the external electronic apparatus through the communicator authentication information for authentication of the external electronic apparatus, and based on a second user voice received at the electronic apparatus and corresponding to the authentication information displayed on the external electronic apparatus, transmit connection information for establishing the WiFi communication between the external electronic apparatus and the access point to the external electronic apparatus through the communicator, wherein the processor is configured to determine that the second user voice corresponds to the authentication information displayed on the external electronic apparatus, and transmit the connection information to the external electronic apparatus through the communicator based on determining that the second user voice corresponds to the authentication information displayed on the external electronic apparatus. a communicator; and a processor configured to: based on a first user voice received at the electronic apparatus and comprising a request to establish WiFi communication between an external electronic apparatus and an access point, transmit to the external electronic apparatus through the communicator authentication information for authentication of the external electronic apparatus, and based on a second user voice received at the electronic apparatus and corresponding to the authentication information displayed on the external electronic apparatus, transmit connection information for establishing the WiFi communication between the external electronic apparatus and the access point to the external electronic apparatus through the communicator, wherein the processor is configured to determine that the second user voice corresponds to the authentication information displayed on the external electronic apparatus, and transmit the connection information to the external electronic apparatus through the communicator based on determining that the second user voice corresponds to the authentication information displayed on the external electronic apparatus. based on a first user voice received at the electronic apparatus and comprising a request to establish WiFi communication between an external electronic apparatus and an access point, transmit to the external electronic apparatus through the communicator authentication information for authentication of the external electronic apparatus, and based on a second user voice received at the electronic apparatus and corresponding to the authentication information displayed on the external electronic apparatus, transmit connection information for establishing the WiFi communication between the external electronic apparatus and the access point to the external electronic apparatus through the communicator, wherein the processor is configured to determine that the second user voice corresponds to the authentication information displayed on the external electronic apparatus, and transmit the connection information to the external electronic apparatus through the communicator based on determining that the second user voice corresponds to the authentication information displayed on the external electronic apparatus.