Abstract: This paper evaluates the feasibility and reliability of assigning insects to orders according to math-morphological features (MMF) and describes kinship among the insects of various categories within the same taxonomic level from the perspective of mathematical morphology. Statistical analyses of 7 MMF (such as form factor, lobation, etc.) from images of 34 species of insects of the Hemiptera, Lepidoptera and Coleoptera were used in this evaluation. The results indicate that the ranked reliability of MMF for assigning insects to orders is, from high to low: roundness, eccentricity, hole number＞lobation, sphericity, circularity＞form factor. According to variation in each MMF, the kinship of the three orders examined could be ranked as follows: Hemiptera & Coleoptera＞Hemiptera & Lepidoptera＞Lepidoptera & Coleoptera.

Key words: insect taxonomy, mathmorphological character (MMC), computer vision technology, order