The utility model relates to a liquid color identification tester which has a colorimetric black box, a movable shading cover provided on the top of the colorimetric black box, a light source hole provided at one side of the colorimetric black box and embedded at the front end of a LED cold light source, an analyzer controller connected with the control wire of the LED cold light source, a test hole provided at the other side of the colorimetric black box and embedded at the front end of a detection sensor, the output end of the detection sensor being connected with the input end of the analyzer controller, a colorimetric tube slot provided on the pedestal of the colorimetric black box, and an output unit connected with the output end of the analyzer controller. The color tone of the standard solution is converted into RGB trichromatic X, Y and Z digital signals, wherein one RGB digital signal corresponds to the color tone of one concentration, and a digital signal database is established for standard color tones according to the concentration differences; the digital signals of the test sample are compared with the standard signals stored in the database, to obtain the concentration of the test sample. The utility model has the advantages that the tester can realize the quantitative description and control of colors based on the single standard, thereby increasing the measurement accuracy.