The present invention relates to a phototherapy apparatus, to a method for operating same, and to a treatment method using same. The phototherapy apparatus includes a body including a first resonator generating a first wavelength of light, a first module connected to the body and radiating the first wavelength of light generated from the first resonator to the outside, and a second module generating a second wavelength of light using the first wavelength of light transmitted from the body and radiating the second wavelength light to the outside.
