For the excellent situation display ability of head up display, enhanced vision display and synthetic vision display, the ability of pilot爷s situation recognition and perception will be obviously enhanced by using them together. Simultaneously, head up display (HUD) combined with automatic landing system can decrease the minimum weather standard of takeoff and landing. With enhanced ability of pilot爷s situation recognition ,a high efficient method is required to certificate the airworthiness of situation recognition system. Based on employing combination of HUD and enhanced vision system (EVS), synthetic vision system (SVS), the paper proposes a combined optimum flight test method on crew situation recognition system for civil aircraft and acceptance criteria based ontask.