本文旨在探究城市化、数字化、老龄化叠加背景下城市社区老年人的数字融入影响机制，将研究问题细分为数字融入之概念界定、影响因素、影响机制及应对策略。不同于以往研究多着眼于个体和家庭层面，本文把对老年人数字融入的研究视角拓展至社区这一中观层面，并丰富了数字融入的概念内涵，把前人研究中仅强调使用层面深化至网民身份认同的文化心理层面。通过质化量化相结合的研究方法，本文构建并验证了城市社区老年人数字融入影响机制模型。质化部分，基于对北京城区老年人实地访谈的扎根理论方法，发现了新的解释变量和被解释变量“感知疫情胁迫”“网民身份认同”及新的影响路径。量化部分，根据扎根理论分析结果及在扬弃性借鉴已有技术接受理论模型的基础上，本文对理论模型进行了调整，并依据问卷调查数据，对模型进行检验和修正，形成最终的影响机制模型。本文认为，数字融入是行为主体在特定数字化场景下有意愿通过对数字技术或ICTs的有效使用而满足日常生活需求，并对网络文化逐渐了解和产生网民身份认同的过程和结果。数字融入的内涵包括基于信息基础设施物质门槛之上的对数字技术或ICTs的使用意愿、使用能力和对自身的网民身份认同三个关键要素。从进化论视角看数字融入，其本质是社会数字化与人口老龄化之间的动态平衡。而疫情加速社会趋向全面数字化，加剧了两者之间的非平衡态。正如达尔文自然领域所谓“自然选择”，在当下社会领域亦面临着“技术选择”的考验。研究结果显示，城市社区老年人的数字融入呈现出群体分化景象。数字融入影响机制除包括多条直接路径外，还存在若干间接影响路径：感知有用性、感知疫情胁迫均通过使用意愿的部分中介作用增强老年人对自身网民身份认同的影响；感知风险通过负向影响使用意愿而抑制网民身份认同；感知易用性在感知疫情胁迫和老年人数字融入之间起到调节作用。以理论分析为基础，本文提出数字融入应对策略的四大着力点：数字素养教育、技术驯化改造、网络空间治理、媒体科普传播。本文还提出“技术选择—协同演化”的概念，对数字融入这类“跨技术文化适应”现象，力图提供一个更具一般性的解释分析工具。

The purpose of this dissertation is to explore the influencing mechanism of digital inclusion of the older adults in urban communities under the background of urbanization, digitalization and aging, and the research issues are divided into the definition of digital inclusion, influencing factors, influencing mechanisms and coping strategies. Different from previous studies that mostly focus on the individual and family levels, this dissertation expands the research perspective to the community level, and enriches the concept of digital inclusion. It deepens the previous studies that only emphasize the use level to the cultural and psychological level of Internet users' identity identification. This dissertation constructs and verifies the influence mechanism model of the digital inclusion of the elderly in urban communities by qualitative as well as quantitative methods. In the part of qualitative analysis, based on the grounded theory method of in-depth interviews with older adults in Beijing urban communities, new explanatory variables and explained variables "perceived epidemic stress", "internet user identity" and new influence paths were found. In the quantitative part, based on the analysis results of the grounded theory and the sublation of the existing technical acceptance model, this dissertation adjusted the theoretical model, tested and revised the model according to the questionnaire survey data, and formed the final influence mechanism model.This dissertation argues that digital inclusion is the process and result of the actor's willingness to meet the needs of daily life through the effective use of digital technology or ICTs in a specific digital scene, and gradually understand and produce the identity of internet users. The connotation of digital inclusion includes three key elements: the willingness to use digital technology or ICTs, the ability to use them and the identity of internet users. From the perspective of evolution, the essence of digital inclusion is the dynamic balance between the digitization of society and the aging of population. The epidemic has accelerated the digitization of society rapidly and comprehensively. Just like the so-called "natural selection" in the field of nature by Darwin, the current social field is facing the ordeal of "technological selection" and the survival of the fittest.The results show that the digital inclusion of the older adults in urban communities presents a landscape of differentiation. In addition to multiple direct pathways, there are also several indirect influencing pathways: both perceived usefulness and perceived epidemic stress enhance the influence of the older adults on their own Internet user identity through the partial mediating effect of willingness to use; Perceived risk inhibitions netizen identity by negatively affecting willingness to use; Perceived ease of use played a moderating role between perceived epidemic stress and digital inclusion of the older adults. On the basis of theoretical analysis, this article proposes four focal points of digital inclusion coping strategies: digital literacy education, technology domestication, cyberspace governance, and media popularization and communication. This dissertation also proposes the concept of "technological selection & co-evolution", which tries to provide a more general interpretive tool for the phenomenon of "cross-technological literacy adaptation" such as digital inclusion.