The present invention relates to an augmented reality object providing method and server using image authentication and, more specifically, to an augmented reality object providing method and server using image authentication, wherein an augmented reality object is registered using a first real-world image captured by a first mobile terminal and an input message, and according to the registration of the augmented reality object, a notification message is transmitted to a second mobile terminal corresponding to recipient information, so as to allow a second user of the second mobile terminal to experience augmented reality by outputting the registered augmented reality object in a second real-world image captured by the second mobile terminal.