The invention provides an intelligent detector of drinking water quality. The detector comprises a water intake pipe, a detection ring, a spectrum detection device, a microprocessor, a storage device, a battery, a power-driven rotary device and a signal connecting device, wherein the detection ring comprises multiple detection cavities and annular pipelines, the detection cavities are arranged along an annular base piece, and detection test paper is arranged inside every detection cavity; the detection cavities and the annular pipelines are vacuum inside, after sealing fins are pierced by the water intake pipe, a water sampling is automatically delivered into the annular pipelines and makes contact with the detection test paper, and then color change appears; the spectrum detection device conducts collection of spectral information of the detection test paper after color change, and the microprocessor acquires a standard test chromatography wavelength coverage code and a comparison algorithm of the test paper stored in the storage device, conducts a comparison operation with collected spectral information, and outputs a detection result. The intelligent detector of drinking water quality conducts a standard comparison through the spectral information, and thus chroma errors caused in visual inspection are avoided, detection accuracy is improved, and automation and intellectualization are achieved; meanwhile, a structure of a dial plate is adopted, and thus the intelligent detector of drinking water quality is simple in structure, convenient to carry out; in addition, cost is lowered.