GB/T 3979-2008 "Measuring method of object color" standard stipulates the measurement of object color by Light spectrum photometric colorimetry, photoelectric integral colorimetry and visual comparison Measuring method. This standard applies to the measurement of reflection and transmission object color, not to the measurement of fluorescent object color. The standard clarifies the terms and definitions, including color function, relative colorimetric function, CIE 1931 and CIE 1954 standard chroma observer, etc. The test method is based on the requirements of Light spectrum photometer, including Wavelength range, Light spectrum resolution and photometric accuracy and other technical conditions. The standard also specifies the technical requirements and classification of standard whiteboards to ensure Measurement accuracy and Reliability.