A system for preparing a liquid food from a food substance comprising a device and a capsule removably insertable in the device, by passing water through the substance in the capsule. The device includes a water injection head for injecting water in the capsule and a capsule holder for holding the capsule in the device, a mechanism for centrifugally driving the capsule, and a perforating member configured relative to the capsule in the device to open outlets at the periphery of the capsule. The capsule includes a pierceable membrane, and the perforating member is suited to be engaged through the membrane for forming with the perforated membrane a filter for retaining solid particles in the capsule and orifices in the membrane for enabling the centrifuged liquid to leave the capsule.