Various embodiments of the present invention relate to a device and method for controlling iris recognition parameters in an electronic device. Here, the electronic device may comprise a processor for: identifying an iris recognition environment using an image sensor module for acquiring an image, a light emitting module for emitting an infrared ray, and input information of the electronic device; modifying at least one iris recognition parameter on the basis of the iris recognition environment; emitting an infrared ray through the light emitting module on the basis of the modified iris recognition parameter; and performing iris recognition using an image acquired by the image sensor module. Various other embodiments are also possible.