1. A providing method of a user terminal, the method comprising: acquiring an iris image; determining a capturing condition of the iris image; converting the acquired iris image to an iris code and performing iris recognition by comparing the converted iris code with an iris code corresponding to a determined capturing condition among pre-registered iris codes; determining a physical condition of a user who is subject to the iris recognition on the basis of an iris recognition matching rate being within a preset range; and providing a determined physical condition result.