GF4 is the debut of high resolution remote sensing satellite on GEO. The technic development in this domain is briefed, and the highlights of AOCS for GaoFen4 satellite are detailed, including transfer orbit control via star tracker, attitude control with small angle step maneuvering and stabilizing, and sunlight avoiding control. Besides, the verifications of these technologies are also presented based on orbit flying data. The future technical developing trends are proposed finally.