The origin of beer is closely related to the origin of grain, and human beings have been making alcoholic drinks from grain for more than 8000 years. The oldest known wine literature is the method of making sacrificial beer carved by Babylonians with clay tablets around 6000 BC. In 4000 BC, there were 16 kinds of beer made of barley, wheat and honey in Mesopotamia. Bitter agents have been used since 3000 BC. 18th century BC, King Hammurabi of Babylon (? ~ BC 1750), there have been detailed records about beer. Around 1300 BC, Egyptian beer developed highly as an excellent industry under state management. The hieroglyphics on the Rosetta stone discovered by Napoleon's Egyptian Expeditionary Force in Egypt show that beer feasts were very popular in this area around BC 196. Beer brewing technology was introduced into western Europe from Egypt through Greece. 188 1 year, E hansen invented the pure culture method of yeast, which made the science of beer brewing advance by leaps and bounds, from mystery and empiricism to science. The application of steam engine and the invention of 1874 Linde refrigerator made the industrialized production of beer a reality. The annual output of beer in the world ranks first among all kinds of wines, which has exceeded 100000Ml, while 1986 produces beer10/588.7 ml all over the world. See table10 for the countries before beer production 1986.