Double standard deviation analysis with 11 math-morphological features (MMFs) ( such as area, perimeter, etc. ) from the images of 23 species of insects of the Pentatomidae, Coreidae, Noctuoidea, Saturnijdae, Pieridae, Melolonthidae, Rulelidae and Cerarnbycidae families was made to assess its use in insect taxonomy at family level. The results indicate that the ranked reliability of MMF in the identification of insect families is, from high to low:  roundness likelihood, eccentricity, circularity＞X-length, form parameter, lobation＞area, perimeter, sphericity＞Y-length, hole number. From the perspective of mathematical morphology, the kinship can be ranked as follows: Pentatomidae and Coreidae＞Rulelidae, Cerarnbycidae and Melolonthidae＞Noctuoidea, Saturnijdae and Pieridae. The results are similar to those of statistical hypothesis testing analysis.