An energy-saving method and apparatus for boiling wort in a beer brewing process is easily implemented and managed. The wort (W) to be boiled is supplied to a wort kettle (2) in a batchwise and discontinuous manner, and each batch (C) of wort (W) supplied to the wort kettle (2) is boiled during a boiling phase, whereby the wort vapor (D) escaping during the boiling phase is supplied to a vertical column (10) connected on the steam side to the wort kettle (2), and is rectified in the vertical column.