Instability is the norm, and emergency management has gradually become the general situation of organizations. Due to the enterprise business systems are developed to handle certain business under a planned and controlled assumption, cannot solve the uncertain business. Instead, a large number of uncertain business mainly rely on people’s interactives which bring diverse perspectives and sharing knowledge to solve. This paper interprets the representation of shadow system under uncertainty and further analyzes one type of obstacle of human-system interaction based on empirical analysis. Finally, this paper designs a conceptual framework about the feedback and enabling between shadow system and legitimate system to solve this obstacle.