1. A spectroscopy apparatus comprising: detectors configured to obtain detection spectrums of respective detection areas that are located at different positions of an object; and an information processor configured to obtain a target spectrum of a target area by using position information of the detection areas and the detection spectrums obtained by the detectors, wherein the information processor is configured to obtain the target spectrum at a specific position of the target area by applying weights to the detection spectrums of the respective detection areas based on the position information and combining the weighted detection spectrums.