"Beer is now at its lowest point in 66 years," said the bureau's Louise Gates.
While Australians are drinking less beer per person -- continuing a downward trend which began in the 1970's -- wine consumption has gone up.
The bureau, which estimates consumption based on the availability of alcoholic drinks, said in terms of pure alcohol, beer was down 2.3 percent in 2011-2012 on the previous year.
Wine, however, rose 1.9 percent over the same 12 months. Spirits experienced the largest fall, down 4.0 percent.
"The overall picture is that consumption of alcohol in Australia has fallen for a second year in a row; 2011-12 saw us drink 1.4 million litres less than we did in 2010-11, and 2.7 million litres less than in 2009-10," said Gates.
The figures showed that over the past 50 years, alcohol consumption in Australia had changed dramatically.
In particular, beer has dropped markedly -- from about 75 percent of the pure alcohol available in 1961-62 to 41 percent 50 years later.
"Over the same period the proportion of wine has increased from 12 percent to 38 percent," the ABS said.
Alcohol abuse is considered a serious problem in Australia, where about one in five people drink at a level that puts them at risk of harm or injury over their lifetime, according to the National Drug and Alcohol Research Centre.