Abstract: A breast cancer diagnosis system includes a probe that sequentially outputs light of a plurality of wavelengths of a near-infrared area to a target object, receives reflected light, and sequentially processes the reflected light; a central control device that receives optical data of the reflected light sensed by the probe, calculates a concentration of chromophore of the target object for each chromophore, and generates an image of the chromophores indicating a distribution of the concentration value of each chromophore; and a display that outputs the image, in which in the probe, one or more channel signal processing units including one or more light irradiation modules and light collection modules may be disposed, and each of the channel signal processing units sequentially operates so that each of the channel signal processing units may generate the optical data of the reflected light.