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The distribution of indoor air pollutants is subject to the distribution of dust particles in the outer atmosphere, which is constantly changing due to the influence of regions, seasons and weather. The indoor environment is different due to different pollution sources, and the structure and use patterns of the buildings. The particle size distribution such as the type and size of fine suspended particulate contaminants in the real environment will have a great impact on the efficiency of PM2.5 filtration by air purifiers. Therefore, the evaluation of the efficiency of the cleaner filter, air filter The application of QA/QC in the process of consumables R&D and production line will help to reduce the cost of testing and time efficiency.