Abstract: In this paper, we propose a parallel multi-access selection algorithm based on synergetic theory. First, Synergy degree evaluation mode is established. In the model, every candidate network is a system composed by several attribute subsystems. Subsystem is defined as a certain kind of network’s expected attribute or property, while order parameters of subsystem are parameters related to this attribute. The algorithm firstly calculates the synergy degree of each single network available according to the model. The degree determine whether the network can be aggregated. The alternative multi-network schemes are formed by these networks’ combination. Then, the algorithm calculates the synergy degree of each aggregated network gotten from attribute aggregation. The scheme whose synergy degree is maximal will be selected as the final decision. The simulation results show the algorithm proposed can arrange channels more reasonably, reduce block possibility of new-arrivals. Thus it can increase the users’ average throughput, and reduce power consumption per bit and cost per bit as well.