OBJECTIVES: Research investigating the quality of life (QOL) of breast cancer patients undergoing chemotherapy has yielded useful knowledge regarding the effects of cancer treatment on the quality of life of patients. This study reviews the assessment of the quality of life for those diagnosed with breast cancer. DESIGN: A systematic review was conducted. DATA SOURCES: This systematic review utilized online databases, including PubMed, Web of Science, Scopus, and Google Scholar. A search ranging from 2018 to 2024 was carried out. REVIEW METHOD: Medical Subject Headings (MESH) were used for keyword selection along with other target keywords, such as “Quality of life”, “Breast cancer”, “Chemotherapy”, “Treatment side effects”, “Patient experience”, “Psychosocial well-being”, “Physical functioning”, “Emotional distress”, and “Supportive care”. We reviewed and included all English-language publications. A narrative synthesis was conducted to present the results of the studies. RESULTS: A total of 300 studies were obtained from the search using the specified keywords. Each result underwent another filtering round after applying the inclusion and exclusion criteria. This process led to a final selection of 20 papers that met the requirements and were included in the systematic review. CONCLUSION: The use of instruments to measure the quality of life (QoL) of breast cancer patients is crucial in understanding the impact of breast cancer on patients’ lives, from physical and mental health to social aspects.