The researchers invented "3-in-1 Baby carrier" product which can improve the coverage and provide multiple functions. The product invention can also cultivate children to cherish resource, and that makes the baby carrier more valuable. The researchers collected and analyzed the commercial baby carrier products, identified the directions of improvement, gradually improved these baby carriers, and invented 3-in-1 baby carrier. There are 3 new features in the baby carrier. First, it has extended arms to increase the cover area for carrying baby. Secondly, it can be transformed into a shape for dressing. The third is that it can be used as a backpack. The user experience test of this baby carrier was conducted by 10 parents and 3 baby caregivers. In the final, researchers summarized the new features of this baby carrier, and review the comments feedback from the testers, and suggest the future work.