In this research, L9 orthogonal array using the Taguchi method and the subjective quantification method were used for ultrafine copper powder analysis. Cellulous types, cellulous-adding weights, stirring rates, and reducing-agent weights were chosen as primary factors. Particle size, microstructure, re-dispersion properties, settling velocity, and crystal analysis were chosen as desired targets. The experimental results showed that each experiment of L9 can form pure copper powder. Three different celluloses not only caused the steric stabilization, but also provided an interface to change the nucleation system. Finally, different forms of ultrafine copper powder with good dispersivity were synthesized during our investigation.