1. A method of obtaining an image for test result object of a disc, the method comprising: fixing a positioning of a disc by using magnetic attraction creating an alignment between a first magnet installed on the disc and a second magnet installed on a feeding unit; minimizing an alignment difference of the first and second magnets, wherein minimizing the difference is performed by moving the feeding unit in a direction from an outer circumference of the disc to an inner circumference of the disc and in a direction from the inner circumference to the outer circumference one or more times; and obtaining an image of an analysis or test result object on the disc using an image obtaining unit.