Driven by the shortage of qualified nurses and the high percentage of aging populations, the ambient assisted living style using intelligent service robots and smart home systems has become an excellent choice to alleviate the heavy burden on families and society. The efforts to help achieve healthy aging in place should not only be paid to the support for activities of daily living, but also the care of mental health. However, older adults' unique living environment and the differences in ability to express themselves make the affective interaction very difficult. This paper develops a domestic service system and proposes a mechanism for evaluating and regulating their emotions. Facial recognition, as well as a behavior model established according to the usage of the service system, was used to evaluate their physical and mental state. A set of affective interaction scenarios tailored to their preferences was developed to improve their emotions. The experiment results show that the system can meet their affective interaction needs and can be accepted by older adults.
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