A portable ultraviolet excited fluorescence intensity detector (100) and method thereof are provided. Including a housing (200), the detection aperture being formed in the planar sidewall of said housing (200), the UV light emitting light path, the first light receiving light path and the second light receiving light path being such that these light paths are coplanar Said UV light emitting light path, said first light receiving path and said second light receiving path after said portable ultraviolet excited fluorescence intensity detector is placed on a flat substrate to be tested, said housing being defined in said housing (200) An optical path is converged to one point in the surface of the planar substrate, and an ultraviolet light source is disposed in the ultraviolet light emission line optical path, and is configured to emit ultraviolet light toward the one point and excite fluorescence therethrough, The first sensor (921) and the second sensor (931) are disposed in the first light receiving optical path and the second light receiving optical path, respectively, so that the sensors can selectively operate. The first sensor is designed to convert light of wavelength 420-480 nm into an electrical signal proportional to its light intensity, and the second sensor is designed to convert light of wavelength 480-760 nm. Designed to convert to an electrical signal proportional to its light intensity, the excited fluorescence passes through the first filter device and the second filter device, respectively, and the first sensor and the second The first filter device and the second filter device are assigned to the first sensor and the second sensor so that quantitative fluorescence detection can be performed on the raw material of the disposable hygiene product, Detector.ポータブル紫外線励起蛍光強度検出器（１００）及びその方法が提供される。ハウジング（２００）を含み、検出開口が前記ハウジング（２００）の平面側壁内に形成され、紫外線発光光路、第１の受光光路及び第２の受光光路は、これらの光路が同一平面上にあるように前記ハウジング（２００）内に規定され、前記ポータブル紫外線励起蛍光強度検出器が試験される平面基板上に置かれた後、前記紫外線発光線光路、前記第１の受光光路及
