Cold water tea making is also called "cold tea making", that is, tea is brewed with cold water, which can be said to be a way to subvert the traditional tea making. However, with the accelerated pace of people's life, the lifestyle of making cold tea has begun to be widely accepted by the public.

The cold water developed in China can leach raw Pu 'er tea, green tea and black tea, and the cold water leachable green tea developed in Japan has increased year by year. Compared with the traditional tea-making technology, the processing technology of cold tea is characterized by prolonging the steaming time of fresh leaves, reducing the degree of fine kneading, and drying by high fire. Unilever developed a new processing technology of cold-water brewed tea, and obtained European and international patents in September 20001year.