GB/T 38879-2020 "Particle Size Analysis—Color Image Analysis Method" was implemented on August 1, 2020. It specifies the principles, equipment, sample preparation, procedures, and reporting requirements for particle color image acquisition, processing, and particle size analysis. This standard is applicable to the measurement of various particles using equipment such as image-based particle size and shape analyzers and microscopes, covering multiple industries including minerals, chemicals, and pharmaceuticals. By leveraging color spaces such as RGB and CIE LAB and employing algorithms like filtering and segmentation, this method achieves precise particle identification. Compared to traditional grayscale methods, it offers higher segmentation accuracy and simultaneously captures particle shape and color information. It provides a unified and efficient standardized basis for industrial quality control, scientific research experiments, and process optimization.