PURPOSE: To obtain a herb tea stabilized and aged in drug action of a crude drug and capable of standing to long-term storage and simply usable by pulverizing each part of tree, grass, etc., having drug action and selecting and uniforming the resultant powder and blending the powder with a stabilizing and aging material in an adapted blend ratio to stabilize and age the powder.

CONSTITUTION: Each part of tree, grass, etc., such as leaf, cellulose part, node or root suitably used according to each drug action is pulverized into size and shape adapted to optimum blend of the substrate with a stabilizing and aging material and selected and uniformed. Then the substrate is blended with the stabilizing and aging material in a blend ratio suitable for stabilization and aging. As the stabilizing and aging material, tea leaf or nucleic acid can be preferably used. Further, when far-infrared ray is irradiated as stabilization and aging, a far infrared ray radiating raw material may be applied to a throwing and drawing bag or incorporated into the bag. By the above-mentioned method, herb tea simply usable can be economically produced in large quantities.