What needs to be added is that this report believes that the validation section of this project needs to be further refined. The validation method based on spot drawing-print-detection adopted in this project was affected by the performance of the printer and the quality of printing ink/paper, which would cause certain errors. In order to eliminate this error, it is believed that commercial polystyrene microspheres of known size can be detected to get a more accurate detection error by comparing the detection results with the product specifications. In addition, this paper believes that in addition to detecting micron/submicron particles on the solid surface, the detection system can also realize the detection of nanoparticles by selecting commodity digital cameras with higher imaging performance, or by rewriting the python code to realize the real-time monitoring of chemical particles in fluids.