Abstract: Aiming at the question of lack study about relationship of weak notion properties.Based on a view that people design agent system as agency of individual or social action.Discuss weak notion properties and these properties relationship，bring forward that satisfying weak notion means a agent has autonomy and social property.Define a model to satisfy the weak notion（AS_Agent），discuss its logic structure and work process.Through comparing properties weak notion to object properties， AS_Agent is reusable more than object model.