The spectral irradiance meter uses a linear image sensor on the basis of the light irradiance meter, so that it can simultaneously measure the light irradiance in a wide spectral range like a spectrometer. Usually according to the detector, it will be divided into partial UV band and partial NIR band. At the same time, it also retains the relevant characteristics of the irradiance meter, with NIST traceability calibration, and can be connected to input optical components such as optical fibers and integrating spheres. At the same time, with powerful analysis software, the spectrum, light irradiance, luminous flux and other values can be analyzed and measured.