Abstract: The present invention provides a skin cooling system which can improve skin cooling efficiency and significantly reduce thermal damage and pain caused by heat generated during treatment, using a handpiece for injecting cold air, water, or a mixture of cold air and water. For this purpose, the present invention provides a skin cooling system including: a handpiece for focusing therapeutic light energy onto the surface of the skin for treatment and injecting cold air, water, or a mixture of cold air and water to the skin during treatment; a cold air supply means connected to the handpiece to supply cold air; and a cold water supply means connected to the handpiece to supply cooling water.