An exemplary embodiment of the present invention relates to a manufacturing method of a flow passage network and a flow passage network for minimizing energy loss occurring during fluid flow, and there are effects in which flow loss is reduced during fluid transport and the energy efficiency of flow passages increases by optimizing geometric factors of flow passages on the basis of biomimetic techniques and theoretical formulae of fluid mechanics. Further, it is effective in manufacturing microfluidics in which laminar flow with a low Reynolds number is dominant.