A spectrum measurement system includes a laser light source system, an optical signal receiving system and a beam splitting system. The laser light source system is configured to emit a laser output light beam to the object. The laser output light beam includes at least one of a first and a second peak-wavelength laser. After the object is radiated by the laser output light beam, the object generates a conversion beam. The conversion beam includes at least one of a first and a second spectral signals. The optical signal receiving system includes at least a first and a second signal receivers being respectively configured to receive the first and the second spectral signals. The beam splitting system provides a plurality of light exiting paths being configured to respectively transmit the first and the second spectral signals to the first and the second signal receivers.