Aging is characterized by a gradual deterioration of the physiological integrity of cells, tissues, and organs, resulting in a decrease in the body's physiological functions and an acceleration of the onset of age-related diseases, ultimately leading to death. The aging of the liver, which is a critical metabolic organ, is closely linked to various chronic liver diseases, such as hepatitis, liver fibrosis, and cirrhosis, and it exacerbates their prognosis and is a primary risk factor for their development at all stages. Therefore, a comprehensive understanding of the causes, mechanisms, and potential therapeutic targets associated with liver aging holds significant clinical importance for delaying or potentially reversing liver aging and for treating chronic liver diseases. Stem cells, which are potential anti-aging agents, present a promising and effective alternative for managing liver aging. In this review, we systematically assess the driving factors, characteristics, and underlying mechanisms of liver aging. We then discuss the current status of the use of stem cells to mitigate liver senescence and address related liver diseases. The review reveals that a stem cell-based approach represents a promising therapeutic strategy for combating liver aging and associated diseases.