The invention discloses ferment capable of maintaining beauty and keeping young, and a production method thereof, as well as oral liquid capable of maintaining beauty and keeping young, and a production method thereof. According to the ferment and the oral liquid disclosed by the invention, Chinese wolfberries, red dates, longans, tartarian buckwheat, rhizoma polygonati odorati, angelica dahurica, barley, lily bulbs, lotus seeds and the like are used as raw materials, and are all medical and edible dual-purpose raw materials, wherein four raw materials of the red dates, the almonds, the angelica dahurica and longan aril are warm in nature, four raw materials of the rhizoma polygonati odorati, the barley, the lily bulbs and the tartarian buckwheat are cool in nature or cold in nature, the Chinese wolfberries and the lotus seeds are neutral in nature, and the combined raw materials are neutral in nature. The ferment capable of maintaining beauty and keeping young is prepared through the following steps of inoculating probiotics for the raw materials, and performing preliminary solid fermentation, defibrination and disinfection so as to obtain a new material; mixing fruit juice and the new material so as to obtain a mixture; and after disinfection, inoculating probiotics on the disinfected mixture, and performing secondary fermentation so as to obtain the ferment capable of maintaining beauty and keeping young. The ferment and the oral liquid disclosed by the invention are rich in soluble dietary fibers, oligosaccharide, and a large quantity of probiotics, so that the ferment and the oral liquid have favorable efficacies of cleaning intestines, easing constipation, and eliminating toxins in bodies. After the ferment and the oral liquid are eaten for a long term, the medical value and the health-care effects of reducing blood lipid, reducing weight, expelling toxins, resisting oxidation, whitening the skins, nourishing the faces, preventing and treating carcinoma of large intestines, and preventing heart diseases can be achieved.