The invention discloses a nozzle detecting system and method. The system is located inside a working bin and used for atomizing detection of a nozzle. The system comprises a clamp, video cameras, LED lamp sources and a processor, wherein the clamp is located at the center of the working bin and used for fixing the nozzle; the video cameras are arranged on the periphery of the working bin and used for shooting the cone angles of spray mist sprayed from the nozzle fixed to the clamp; the LED lamp sources are mounted on the top of the working bin and used for giving out a white light source and compensating light for the video cameras; the processor is used for obtaining the light environment inside the working bin, timely adjusting the light source intensity of the LED lamp sources according to the light environment of the interior of the working bin, and conducting grey processing on the spray mist cone angles shot by the video cameras through the light source intensity of the LED lamp sources so to as determine the sizes of the spray mist cone angles. By means of the nozzle detecting system and method, the problem of visual observation is effectively solved, and the labor intensity of operators is relieved; moreover, the influence of the illumination light source on the lighting environment inside the bin can be avoided.