This paper introduces a model for group decision-making problem based on both the preferences of decisionmakers
and the group and the stability of network structure. References of the individual preferences are provided according
to the model, and the measurement of preferences consistency about both decision-makers and the group is calculated. The
decision-makers establish, cancel(disconnect) or strength the links between others, and regulate their preferences in the
model. Both decision-makers preferences and the group preferences network structure can develop to the positive evolution
in the model. Structural stability of the group preferences network structure can be guaranteed, and the group preferences
consistency maximization is achieved, which provide more convenient solutions for information aggregation.