This research suggests rational design of composite cathode by multi step infiltration of Gd0.2Ce0.8O1.95 (GDC) and Sm0.5Sr0.5CoO3 (SSC). By controlling the drying rate of GDC infiltration solution, we can make different nano structures that one is discrete coating and the other is reinforcing the adhesion of interface between cathode and electrolyte. We find discrete coated GDC nano structures which provide enlarged triple phase boundary (TPB) and fast drying rate make the nano structures which deposited between scaffold and electrolyte that help stronger adhesion. Each cell shows better performance than SSC only infiltration cell. Our results show consideration of effects of various infiltrated GDC nano structures on oxygen reduction reactions and suggest high quality cathode design of SOFCs.