Abstract: Expertise is a key element influencing the effectiveness of intuition, however, sharp contrasts exist in the research results of the relationship between expertise and intuition effectiveness. Based on the theory of social network and individual ambidexterity, a nonlinear model of expertise and intuition effectiveness is proposed and tested. The results show that high inner-degree centrality over a critical point exerts a positive influence on intuition effectiveness, in which individual ambidexterity works as a mediator. This suggests an accelerating effect of expertise on intuition effectiveness.