The invention discloses a production method of a fermented needle mushroom beverage with functions of invigorating the brain and benefiting intelligence, and belongs to the technical field of health-care food processing; and the invention specifically relates to a preparation method of a fermented needle mushroom beverage with functions of invigorating the brain and benefiting intelligence. The preparation method of the fermented needle mushroom beverage with the functions of invigorating the brain and benefiting the intelligence comprises the following steps: uniformly mixing millet flour, edible soybean meal powder and edible peanut meal powder; carrying out enzymatic hydrolysis on the mixture so as to obtain a mixed hydrolyzate; inoculating a needle mushroom seed solution into the mixed hydrolyzate, and carrying out fermentation for 80-90 hours so as to obtain a fermentation broth; and then, blending the fermentation broth, and carrying out homogenizing, canning and sterilizing, so that the final products are prepared. The fermented needle mushroom beverage prepared by the preparation method preserves the nutrients and the functional ingredients of the raw materials to the maximum extents; moreover, the brain-invigorating and intelligence-benefiting functions of the ingredients in the soybean meal, including soybean isoflavones and the like, are further improved by the fermentation effects.