Abstract: This paper uses data from the China Family Panel Studies （CFPS） and the multiperiod DifferenceinDifferences （DID） method to empirically analyze the impact of urban digital transformation on residents subjective wellbeing from the perspectives of digital inequality and spatial unevenness The study finds that the implementation of Smart City policy overall increases residents subjective wellbeing Disadvantaged groups in the digital divide，such as rural residents，those with lower educational levels，and the elderly，are unable to enjoy the benefits of urban digital transformation The welfare improvement effect of Smart City is more pronounced in developed areas than in lessdeveloped areas In addition，analyzing the influencing mechanism reveals that Smart City policy has improved residents subjective wellbeing through three channels：social support，work satisfaction，and residents income 

Key words: ubjective well-being, digital transformation, Smart City, digital divide

摘要： 本文使用中国家庭追踪调查（CFPS）数据以及多期DID方法，从数字不平等和空间不均衡角度实证分析了城市数字化转型对居民主观福利的影响。研究发现：（1）智慧城市政策的实施整体上提高了居民主观幸福感；（2）农村居民、受教育程度较低人群以及老年人等数字鸿沟背景下的弱势群体难以享受到城市数字化转型的红利，而且智慧城市的福利提升效果在发达地区较欠发达地区更加明显。此外，剖析影响机制发现：智慧城市从三个渠道提高了居民的主观福利，分别是社会支持度、工作满意度与居民收入。

关键词: 主观幸福感, 数字化, 智慧城市, 数字鸿沟