is the present invention provides a method for producing a packaged beverage. The producing method is capable of suppressing deterioration of the taste, flavor, appearance, and the like of a drink liquid due to heat applied during the production process or due to the effects of oxidation caused by dissolved oxygen in the drink liquid. The packaged beverage has an exceptional taste-flavor balance and a low environmental burden so as to reduce energy costs required during production. The producing method is characterized in comprising: a primary heating-deoxygenation step for heating a raw material solution by mixing together a raw material solution containing one or more plant extracts, and water at a higher temperature than that of the raw material solution, and adjusting the amount of dissolved oxygen in the mixed solution of the raw material solution and water； and a secondary heating-sterilization step for heating the mixed solution to the sterilization temperature thereof and maintaining this temperature for a fixed period of time after the primary heating-deoxygenation step, wherein the amount of dissolved oxygen in the mixed solution is adjusted in the primary heating-deoxygenation step so as to fall within a range of 0.1 ppm-3.0 ppm.本發明提供一種容器裝盛飲料的製造方法，該製造方法可抑制因製造工序中所付與之熱或者飲用液中的溶氧所導致之氧化的影響而飲用液的呈味、香味及外觀品質等經時劣化，並且，呈味及香味的平衡度優異，可削減製造時所需能量成本，因此環境負載亦低。該製造方法的特徵為，包括：一次加熱及脫氧工序，含有植物體萃取物之一種或兩種以上的原料液中，混合比前述原料液更高溫的水，藉此加熱前述原料液，並且調整前述原料液和水的混合液中的溶氧量；及二次加熱及殺菌工序，前述一次加熱及脫氧工序之後，將前述混合液加熱至殺菌溫度並保持一定時間，前述一次加熱及脫氧工序中，前述混合液中的溶氧量被調整為0.1ppm~3.0ppm的範圍。
