A communication connection method of an access point is provided. The communication connection method according to an embodiment includes acquiring information of a first encryption key corresponding to an external device from a user terminal based on a request for communication connection using the first encryption key being received from the external device, performing a communication connection with the external device using the first encryption key, generating a second encryption key corresponding to the external device while the communication connection using the first encryption key is performed, transmitting the generated second encryption key to the external device, and performing the communication connection with the external device using the generated second encryption key based on a request for communication connection using the generated second encryption key being received from the external device after the communication connection using the first encryption key is terminated.