Abstract:Records of Moral Cultivation and Life Sustaining holds that the key to life sustaining lies in conservation of primordial Qi. To conserve such Qi, one has to restrain his desires and keep his spirit. Besides, he should take Taoism as guidance and keep a peaceful mind and accomplish nothing. In addition, he should keep his internal life balance with mean principle. Since one’s birth and death are determined by man rather than by nature, he has to benefit from both peace and movement, take careful cultivation, go on a diet and keep his primordial Qi in order to sustain his life.