Family health promotion is the most important goal of family nursing practice, Especially, in the present day which family has inappropriate living pattern that can impact on family members getting sick both body and mind. Thus, professional nurse and health personnel should have knowledge and skill of promoting family health. Application the related family theories and concepts should be analyzed based on each family context. Especially, family should involve as the health owner with awareness and accepting actual health risk situation. Families need to set their goal and cooperating within family system that can help them to be success. As project report presented in this paper, it could reflect the process of increasing family awareness, right perception, and accepting to have prediabetes person in family, and then they had developed their competency of health promotion to solve their problem that could help the persons free from diabetes. However, some families could not modify new health pattern and lifestyle with consistently, including lacking commitment and fatigue from working. Thus, nurses and health care personnel should strengthen family motivation and morale continuously. In addition, family nurse and health care team should develop new knowledge and skills from lesson learned both success and unsuccessful cases to increase understanding and developing more knowledge, including, effective interventions for achieving health outcomes.