Provided are a device and method for heating and sterilizing liquid food, the device and method allowing food damage caused by direct contact with a high-temperature heat medium to be avoided, the time required for heat exchange to be curtailed, the time in which the food is kept in a high-temperature zone to also be curtailed, and damage to the quality of the food due to high temperatures to be reduced. This device for heating and sterilizing liquid food comprises: a liquid food pump (2) for sending out a concentrated liquid food (1) a coil-type tubular heat exchanger (7) for heating, the heat exchanger being provided with a flow path (6) formed from an inlet (3), an outlet (4), and a tubular exchange wall (5) a heat exchanger (12) for cooling, the heat exchanger being provided with a flow path (11) formed from an inlet (8), an outlet (9), and an exchange wall (10) a prepared liquid food reservoir tank (14) for temporarily storing a liquid food product (13) having been cooled and reduced a dilution water pump (16) for sending out sterilization/cooling dilution water (15) and a fourth flow path (24) for creating communication between a discharge port (22) of the dilution water pump (16) and a merging point (23) of a second flow path (19).Linvention concerne un dispositif et un procédé pour chauffer et stériliser un aliment liquide, le dispositif et le procédé permettant déviter les dommages causés aux aliments par le contact direct avec un milieu chauffé à haute température, décourter la durée nécessaire à léchange de chaleur, décourter également la durée pendant laquelle laliment est maintenu dans une zone à haute température, et de réduire les dommages causés à la qualité de laliment par les hautes températures. Ce dispositif de chauffage et de stérilisation daliment liquide comprend : une pompe à aliment liquide (2) pour envoyer un aliment liquide concentré (1) un échangeur de chaleur tubulaire de type bobine (7) pour le chauffage, léchangeur de chaleur étant mu
