The present invention relates to a method for manufacturing functional acorn tea by adding a waste removal ability to coffee and good components to kudzu. Acorns are dried, ground and roasted with coffee to make tea, or mixed with coffee powder to make functional coffee. Or, acorns are dried, ground and mixed with kudzu to make acorn and kudzu tea.COPYRIGHT KIPO 2017도토리를 말려 빻아 원두커피랑 볶아 차를 내리거나 커피가루랑 섞어 기능성 커피를 만들거나 도토리를 말려 빻아 칡과 섞어 도토리 칡차를 만든다