Check the date to see if the bottled beer exceeds the shelf life.

Look at the color, transparency and foam and pour the beer into a clean, dry, large, colorless, transparent glass. Light yellow beer should be slightly goldenish yellow, not dark; yellow beer should be light yellow or yellowish green, light color is excellent, can not be dark brown; dark beer should be black red or dark brown , can not be dark brown, light red or brown color. However, the liquor is required to be clear and transparent, with light, no suspended matter and sediment. High quality beer, the height of the foam raised when infused into the cup should not be less than 3 cm, and the foam is white and delicate, and it can last for more than 4 to 5 minutes. The beer of lower quality has a lower height of foam. The foam is yellowish, thick, not long-lasting, or foam-free or foaming.

Beer with excellent aroma and temperament should have significant malt fragrance and scent unique to hops; second-class beer, malt fragrance and hop aroma are not obvious; quality, often without malt and hop aroma, even have raw wine smell , aging odor and other abnormal odors.

Try to taste a beer, in your mouth, and test its quality with taste and smell. Beer should have a smell of carbon dioxide from the wine and a refreshing bitterness and unique flavor from the hops. High quality beer, after drinking into the mouth, has a very refreshing feeling, no odor, astringency and so on. Such as yellow beer, bitter, refreshing, delicate; red beer tastes bitter and sweet aftertaste; dark beer tastes rich and thick. Brewing a good quality beer, not only the taste is dull, but also has a bitter taste, astringency, and some will have a yeasty odor, immature beer flavor and other abnormal odor.