A nanometal dispersion and a method for preparing a nanometal dispersion are provided. The method comprises the following steps: providing a first solution containing a metal ion providing a second solution containing inulin mixing the first solution and the second solution to provide a third solution and providing energy to the third solution to conduct a reduction-oxidation reaction to form a nanometal therein. The produced nanometal dispersion comprises inulin and a nanometal with multimorphology.
