The prevalence of insomnia increases with age, and insomnia is a common health problem in old adults. This case is on an elder patient with sleep disorder who was hospitalized for double-dose medication intake, which led to severe medication side effects. From a psychiatric nurse practitioner’s professional perspective, this patient had developed an anticipatory anxiety regarding the medication and thus exhibited poor compliance. To solve this clinical problem, the author considered various non-medication treatments and used evidence-based approach to determine whether footbaths improved sleep quality. The keywords “warm footbath,” “elderly,” and “insomnia” as well as the MeSH terms and synonyms of these keywords were searched for in Chinese and English language studies published before July 7, 2018, in databases including PubMed, Embase, the Cochrane library, CEPS, and Google Scholar. After filtering the search results, we identified four studies discussing the relationship between sleep quality in the elderly and footbaths for subsequent analysis; the completeness and quality of these studies were then investigated using the CASP and Critical Review Form. The results revealed that a 20-minute footbath with water temperature of 41–42 ℃ and depth of 10 cm improved the sleep quality of the patient. It decreased the patient’s sleep latency and maintained their daytime activities. These empirical results demonstrated that a footbath improved the patient’s sleep time and sleep efficiency; moreover, the easy and noninvasive implementation of the footbath served as an assistive treatment that was highly acceptable and satisfactory to the patient. According to this care experience, medical professionals are encouraged to employ empirical skills to identify the health care model that conforms to the actual needs of individual patients.