In this paper, the decision-making behavior is introduced into the queuing models, starting from the customer to maximize the interests, the customer optimal balking strategies in the Geom/G/1 (ES, MV) has been studied. On the premise of unobservable queue, based on a natural reward-cost structure, the overall profit function about the individual customer and the whole customers are constructed by a method of mean value analysis, then the customer equilibrium balking strategies and socially optimal balking strategies are analyzed and determined within the parameters of different ranges. At last, the conclusion is improved by numerical simulation. [ABSTRACT FROM AUTHOR]