A method and device for preparing a hot or cold drink by infusion of a product in water such as tea leaves for example, comprising a step of heating water to a determined temperature, then a step of mixing the leaves with the hot water, and finally a step of removing the infused leaves, comprising at least one step of immersing at least one element made of a porous material during the infusion; determining the temperature to which a predetermined volume of water must be heated; and determining the infusion time of the leaves in said volume of heated water; said infusion time in said volume of water is determined according to the characteristics of the infusions prepared with said leaves, the information relating to said leaves being recorded in a memory unit.