The invention relates to a dispersity detection system, a production system and a production control method. The dispersity detection system comprises a dispersion tank, a light source emitter, a detection device and a test instrument, wherein the dispersion tank is used for containing a suspension to be detected, and the suspension to be detected comprises a dispersing agent and a dispersoid; thelight source emitter is used for providing light of the target wavelength in order to irradiate the suspension to be detected in the dispersion tank; one end of the detection device extends into thedispersion tank and is used for on-line measurement of the absorbance of the suspension to be detected; and the input end of the test instrument is electrically connected to the other end of the detection device and is used for receiving the absorbance collected by the detection device, and the absorbance is used for representing the dispersity of the dispersoid. By the adoption of the dispersitydetection system provided by the embodiments of the invention, on-line detection of the absorbance of the suspension to be detected can be realized, and the dispersity detection system provided by theembodiments of the invention is especially suitable for on-line detection of the absorbance of the graphene suspension.