This study presents an innovative method which integrated KJ approach and scenario method is applied on the product design of new baby home care. First the study got the real requirements of users as the design goals by the investigation and questionnaire. Meanwhile the study combined the advanced technologies of physiological sensing and wireless sensor for three directions development of product concept: A- "temperature sensing", B-"safe guardian" and C- "social interaction" across multi-discipline. The authors hoped to provide the new parents the physical development of the infants or young children the most convenient information. Remote control and network technology help connect home and hospital and show the infants physiological information to doctors, thus aid new families for keeping the good health of infants or young children and for the babies can grow up healthy and safe. The authors adopted scenario method to analyze the user’s behavior and requirements for developing the proposed concept design during product development process. Finally, the authors presented the results of this research by product prototype and scenario movie. The authors hope that this research can lead the development of related advanced technologies and expect this concept product can be produced in the future.