Digital elderly care service is an innovative elderly care model, and its emergence has brought about a huge change in the field of elderly care services (ECSS). The current method is to make the elderly care service more precise and personalized, improve the ability and level, and improve the current ECSS. The defect is that the short of top-level design and overall planning is basically only in the state of trial operation. In order to solve these problems, this paper proposes to study how to intervene in social work in smart ECSS to enhance service capabilities and improve service quality on the original basis. Therefore, based on the use of human-computer interaction technology, this paper deepens the research on the current elderly care services. According to a survey of the elderly in a certain city, the digital elderly care system shows that 25.33% of the elderly prefer to use housekeeping services, and 63% of the elderly prefer healthcare services. The results show that the digital elderly care service system based on human-computer interaction technology is easier to be accepted by the elderly than the traditional elderly care service. The elderly care service system under human-computer interaction is more considerate than the traditional elderly care service system and can make the elderly’s life more colorful.