Multiple STR gene analysis is carried out simultaneously by multiplex PCRreplication technology combined with capillary electrophoresis to apply a system conducive to kinship identification, which can be applied to other animals and pets in addition to the kinship identification of humans, pigeons and cannabis. These other animals include horses that belong to the competition category, common pets such as cats and dogs, and economic animals such as cows and pigs. The kinship of these animals is also very important, for example, the pedigree of horses or precious pets is related to their value, and if the kinship can be determined for the relevant object, the identity can be verified.