In the era of digital economy, smartphones have become an indispensable tool for modern people.However, the silver-haired people often face the problem of "difficult to use" when using smartphones and other intelligent products. In order to study the impact of smartphone use on the subjective well-being of the elderly, a questionnaire survey and field visits were conducted among the elderly in some areas of Hunan Province, and the happiness-related statements in the survey data were extracted, and descriptive statistical analysis, correlation analysis and regression analysis were used to determine the factors that affect the subjective well-being of the elderly as well as the well-being score index. The results show that the use of smartphones has a positive impact on the subjective well-being of the elderly, which not only improves the quality of life of the elderly and promotes their enjoyment of the technological dividends of the times, but also facilitates the work of active aging and the comprehensive development of society.