Mind map uses pictures combined with words to make notes, significantly different from traditional notes. And it is popular among a variety of professionals and organizations abroad. China has witnessed nearly a decade’s mind map craze, but the promotion effect is slender. Because theoretical researches are not thorough enough,the application tends to be formal, superficial, affecting the mind map’s application effect. This paper studies the principle of using mind maps, including that image is the language of the brain, the neurons’ structure, learn the new by the help of existing knowledge, whole brain learning and forgetting curve principle to guide notes drawing. And inspect the applying effect through empirical study on economics study.