Abstract: Using scanning electronic microscope, gas hole of flowerpots were studied andanalyzed quantitatively and a technical terms, gas hole degree was put forword, on whichclustering analysis was based. The gas hole of inner, outer and cross sections offlowerpots had similar two-way effects on ventilation and absorption. But the directionfrom outer section to cross section to inner section was the main trend and the gas holeon the outer section was the main factor. According the effects of 8 types of flowerpot onthe growth of chinese pink, the results indicated that Foshan earthen flowerpots were thebest. As for plastic pots, the pots made in Japan were the best; Taiwan's pots rankedsecond; and the last one is Shunde's pots. The study also suggested that modeling throughexperimentation and optimal subset regression should be a good way for the development offlowerpot products.