This paper discusses what well-being means to caregivers and how it can be measured to confirm its acquisition by using previous research on theoretical and practical aspects.Within the field of psychology, the two types of well-being (subjective and psychological well-being) are combined to form "feeling good and functioning well", which refers to "pleasant subjective experiences, meaningful activities and the realization of human potential in an individual's life".On the other hands, a review study reported on the Global Measure of well-being, that is, depressive symptoms, mental health, QOL, satisfaction with life and health, also on caregiver-specific well-being measures that are burden, role strain, personal strain, stress, competence and self-efficacy. The majority of measures focused on the negative aspects of well-being.If there is no simple measurement tool that captures both the positive and negative aspects of well-being, a comprehensive and quantitative evaluation of dementia care, so for the present there is no alternative but to using multiple tools for evaluation.The Eco-map of the Ecological Social Work method, which was used in a psycho-educational intervention for caregivers, was shown to provide a hint as to how to take a macroscopic and comprehensive view of dementia care and how to easily grasp an understanding of the well-being of caregivers.