A　RFID　technology　and　anti-counterfeiting　system　was　studied　in　this　paper.　Firstly,　we　propose　a　hardware　and　software　framework　of　anti-counterfeit　system　based　on　RFID　technologies;　furthermore　the　hierarchical　structure　of　the　anti-counterfeit　system　was　analyzed　in　details.　Then　aimed　at　the　complexity　of　the　anti-counterfeit　system　an　intelligent　attacking　model　was　presented　here,　and　the　A*　algorithm　is　adopted　in　this　attack　model　and　used　to　search　a　lowest　price　tree　by　the　fictional　attacker　in　order　to　evaluate　the　proposed　anti-counterfeit　system　especially　for　the　protocol　used　in　this　system.　Finally,　an　experimental　testing　with　VC++　and　Matlab　was　simulated.　Simulation　results　indicate　that　the　proposed　modeling　methods　can　be　used　effectively　to　model　complex　anti-counterfeiting　systems.