bsystems and by followingРSternberg’s element adding study pattern , serial studies were made to investigate t he plasticity of visualРcognitive ability in space. The results show t hat different degrees of plasticity and stability do exist in t heРcognition processing of visual space. Moreover , plasticity and flexibility in judgments of appearance swirlРand quantitative spatial relationship and mand of visual characteristics are found greater in t heseРstudies t han t hose obtained by means of appearance scanning , movement inference and judgment ofРcategorical space relation. From t he above mentioned , t he high level system of visual processing isРcharacterized wit h functional structure and dynamics.Р Key Words : visual ability in space ; cognition processing ; spatial cognitionР 701