Based on both non-uniform coverage zone and non-uniform traffic density, a novel dynamic cell configuration system with a new channel assignment scheme has been proposed. With the multi-beam base station, radiating beam is split in the vertical plane to configure a multi-annular zone cellular system. Under the condition non-uniform coverage and non-uniform users' position distribution, we analyze the performance carrier-to-interference ratio of this cellular system on the downlink. With the adaptive multi-beam base station antennas, each beam adjusts its coverage area according to users' position distribution to maintain the maximum average area carrier-to-interference and area spectrum efficiency. Analysis and simulation show the proposed dynamic cellular configuration is efficient.