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Using controlled mobile elements is a promising approach to collect data from sensor nodes. It is very important to calculate a number of near-optimal routes for the fusion nodes that incrementally collect the data. Based on the multi-tier mobile network model, a new moving control strategy is proposed. This method first divides the monitoring field into several sub-regions so that fusion nodes can collect data in their own parts respectively. Then fusion nodes use constraints-based mobile localization (CML) algorithm to calculate the location information of each sensor node. Finally a new maximum likelihood nearest neighbor (MLNN) algorithm is proposed to design optimal routes for fusion nodes. Simulation results show that the moving control strategy suits extremely in the large-scale wireless sensor network and provides a good solution of the problem on tiered mobile network of instable communication and high-fraction of event loss.