The present invention relates to a mobile device having a user authenticable oxygen saturation measuring function for performing authentication of a remote diagnosis patient, and to a method for measuring oxygen saturation by using the same. More specifically, the mobile device comprises: an oxygen saturation measuring unit formed on one surface of the mobile device, and measuring blood oxygen saturation by coming in contact with the finger of a user and a user authentication unit formed in the same position as the position where the oxygen saturation measuring unit is formed, and authenticating a user by recognizing a fingerprint of the user whose finger comes in contact with the oxygen saturation measuring unit. According to the mobile device and the method of the present invention, the mobile device has a function of simultaneously measuring oxygen saturation and user authentication. Thus, blood oxygen saturation which is one of biometric data needed in remotely diagnosing a patient is measured from the peripheral blood vessel of the finger of a patient, and the fingerprint of the finger for measuring oxygen saturation is recognized, so authentication is performed. Oxygen saturation measurement and user authentication are simultaneously performed through a mobile device. Accordingly, a separate oxygen saturation measuring device is not needed, and oxygen saturation is simply and conveniently measured by using electrical power of the mobile device. At the same time, a user can be authenticated, so a remote diagnosis system can be more effectively and stably operated.COPYRIGHT KIPO 2017본 발명은 원격진료환자 본인확인을 위한 사용자 인증가능 산소포화도 측정 기능을 구비한 모바일기기 및 이를 이용한 산소포화도 측정 방법에 관한 것으로서, 보다 구체적으로는 상기 모바일기기의 일면에 형성되며, 사용자의 손가락을 접촉하여 혈중 산소포화도를 측정하는 산소포화도 측정부 및 상기 산소포화도 측정부가 형성된 위치와 동일한 위치에 형성되며, 상기 산소포화도 측정부에 손가락을 접촉한 사용자의 지문을 인식하여 사용자를 인증하는 사용자 인증부를 포함하는 것을 그 구성상의 특징으로 한다.본 발명에서 제안하고 있는 원격진료환자 본인확인을 위한 사용자 인증가능 산소포화도 측정 기능을 구비한 모바일기기 및 이를 이용한 산소포화도 측정 방법에 따르면, 모바일기기가 산소포화도 측정과 사용자 인증을