1. A providing method of providing information to a user of a user terminal, the method comprising: capturing, by a camera, an iris image of a user; identifying, by a processor, a capturing condition of the iris image; converting, by the processor, the iris image to an iris code; performing, by the processor, iris recognition by comparing a pre-registered iris code stored in a memory corresponding to the capturing condition of the captured iris image and the converted iris code; calculating, by the processor, an iris recognition matching rate in a process of performing the iris recognition by a processor; identifying, by the processor, a physical condition of the user who is subject to the iris recognition, in response to the iris recognition matching rate being within a preset rate; and displaying an identified physical condition result on a display.