SPA is defined by the International SPA Association as: SPA is committed to improving people's overall health by providing various professional services that encourage the renewal of ideas, bodies and spirits. SPA in a narrow sense refers to spa beauty care. Different forms of SPA, including cold bath, hot bath, alternating hot and cold bath, seawater bath, hot spring bath, tap water bath, etc., can relax and relieve tense and tired muscles and nerves to some extent, eliminate toxins in the body and prevent diseases. In addition, hydrotherapy combined with various aromatic essential oils massage will accelerate fat burning and have slimming effect. SPA includes facial care, music massage, aromatherapy, lymphatic detoxification, hydrotherapy, mud therapy, ocean therapy, yoga, five senses therapy and so on. Taking health care, beauty, fitness and comfort as the main purpose, water, color, sound, light, plant aromatic essential oil, dead sea mineral mud and even hot stone are used as beauty treatment tools to satisfy people's vision (color, natural landscape).