This device can quickly and accurately measure the color values and chromaticity differences of liquid or solid surfaces, including juice color, soy sauce color, and oil Lovibone value; Suitable for fields such as food, beverages, chemicals, coatings, textiles, pharmaceuticals, and environmental protection. Whiteboard+black tube automatic calibration, power on self-test, abnormal prompt; Coloring dish, powder testing box, film fixture, and liquid flow cell are optional. Used for juice color, soy sauce color, and oil Lovibone value; Color difference control, batch consistency, weather resistance evaluation; Comparison of dye formulas; Solution clarity and API color grading; Monitoring of waste liquid discharge, etc.