This paper introduces a discrete wheel-switching chaotic system (DWSCS). Changing the controlling sequence of the wheel switch allows DWSCS to generate a large number of new chaotic sequences from a set of existing chaotic maps (seed maps). Simulations and analysis demonstrate the DWSCS's characteristics and chaotic behaviors. An FPGA design of DWSCS shows its effectiveness in hardware implementation. We also propose a pseudo-random number generator using DWSCS whose excellent performance has been shown in experiments and comparisons. © 2004-2012 IEEE.