In the UK, residential care facilities are in demand, and their importance to the healthcare system is unquestionable. The study aims to analyze the existing primary research evidence on residential care and its impact on older people and to report a summary and critical appraisal of the research findings. The research used a systematic literature review (SLR) design. The researchers searched 5 electronic databases (PubMed Central, PsycINFO, CINAHL Plus, Embase and BMC Geriatrics) Based on the Preferred Reporting Items for Systematic Reviews and Meta-Analysis standard (PRISMA). The qualitative synthesis involved extracting data and evaluating bias risk using a validated guideline, conducting meta-analysis using Mean Difference and Standard Mean Difference calculations, and quality-testing the evidence using the GRADE approach. The study revealed that residential care, along with various factors like environments, social connections, care location and standard of care significantly impact the well-being, QOL, and overall health of older adults.