This study, taking the urban elderly as the research object, explores the smartphone use’s influence on their eudaimonicwell-being. It constructs an extended technology acceptance structural equation model by integrating eudaimonic well-being and intergenerational support, based on Technology Acceptance Model (TAM). The fndings show that perceived usefulness of the elderly has signifcantly in?uenced the smartphone use attitude, and perceived ease of use has also signifcantly in?uenced the smartphone use attitude through perceived usefulness. Also the intergenerational support has signifcantly in?uenced the smartphone use attitude, use intention and actual use and eudaimonic well-being of the elderly. But there is no evident link between perceived enjoyment and use attitude.This study proposes that the development and designing of IT programs should be benefcial and friendly to the elderly and that the society should also call fortheyoung’sintergenerational technical support for the old to enhance their eudaimonic well-being.The intergenerational technical support in this study has extended the in?uence factor of eudaimonic well-being and contributed to the further development of TAM.