This　paper　argues　that　the　phenomenon　of　industrial　clusters　is　a　kind　of　complex　and　dynamic　process.　With　the　heterogeneity　of　firms　involved　in　clusters　and　their　open　connections　with　external　environment　being　reasonably　justified,　the　paper　thinks　that　the　evolution　of　industrial　clusters　should　be　observed　and　studied　by　the　approach　of　computer　simulation.　Some　factors　from　inside　or　outside,　local　or　global,　work　together　to　drive　the　growth　and　decline　of　industrial　clusters.　Some　implications　are　drawn　through　the　analysis　of　the　results　by　simulations　designed　on　java-swarm　platform.　Suggestions　are　proposed　accordingly.