ZhuXi’s natural philosophy incorporates such a objective and idealist philosophical system as the “ Li-centered, Li-mained, Li-yi for a special”, “Li-Qi always Combine”and a theory as the relationship to li-Qi.It also incorporates the epistemology as “teachers” and “static”, contacts analyzing things continued to “nothing baht analysis”and accumulate to result in the counteraction. This ontology and epistemology, as well as related scientific spirit had a profound impact on ZhuXi’s own scientific activities,science and technology of ancient China’s development. Making a reasonable look, getting the essence, discarding the dross still have a very profound practical significance to present-day scientific research.