A contimuous-wave (CW) output has been obtained from a polycrystalline 8% mole ratio Yb∶Y2O3 ceramic disk laser with end-pumping and double-pass absorption cavity, which is end-pumped by a collimated high-power laser diode with the central wavelength located at 970 nm, at room temperature. The threshold pump power of the laser is 7 W, and under pump power of 35 W a CW output power of 10.5 W at 1078 nm is obtained, with optical-optical conversion efficiency of 30% and slope efficiency of 37.5%. There exists a rough linear rise for the output power with the pump power. The higher output power and efficiency can be expectable by adopting higher pump power, optimizing the cavity parameters and decreasing influence of thermal effect.