For　computational　intensive　applications,　effective　and　high　performance　computing　capacity　is　of　the　most　important.　Besides　the　large　scale　parallel　computers　or　supercomputers,　small　calculating　arrays　based　on　DSPs　or　FPGAs　have　become　a　reasonable　selection　for　relatively　lower　cost　circumstance.　In　this　paper,　we　have　developed　a　high　Productivity　ill　computing　system　(HPCS)　based　on　FPGA.　In　this　system,　the　HPCS　,a　Unit　(HCU)　board　uses　two　pieces　Altera　Stratixll　2S60/90/180　and　can　communicate　with　an　optional　host　PC　via　PCI/PCl-x　interlace.　The　IEEE-754　compatible　double　precision　floating　point　arithmetic　IP　package　was　realized　to　meet　the　computational　requirements.　Device　drivers　for　the　HCU　board　were　written　for　both　Linux　and　Windows　OS.　The　HPCS　hay　been　applied　to　accelerate　plasma　simulation　Code　called　TRISTAN.　When　simuluting　512k　particles,　the　result　shows　that　the　HPCS　performs　about　20　times　faster　that?　a　Pentium-IV　2.8GHz　PC　with　1GB　DDR　memory.