The　low　cycle　corrosion　fatigue　test　in　H2S　environment　is　challenged　by　the　measurement　system　due　to　harsh　environment,　long-time　test,　high　experimental　cost,　real-time　measurement　and　control　difficult.　With　this　understanding,　the　system　for　low　cycle　corrosion　fatigue　test　is　modified　and　upgraded.　A　high-speed　A/D　card　is　installed　in　the　system＇s　computer　for　displacement/strain　data　acquisition,　instead　of　previous　DH3819　static　strain　gauge.　The　software　written　in　Visual　Basic　6.0　is　employed　for　real-time　data　processing　and　accurate　loading　control　using　closed-loop　control　system.　The　control　software　also　has　the　functions　to　automatically　respond　to　the　overflow　of　load　and　displacement,　and　the　rise　of　emergency,　such　as　power　blackout.　As　a　result,　the　upgraded　system　has　the　abilities　of　fast　data　acquisition　and　processing,　accurate　and　real-time　control,　and　low-cost,　reliable　operation　in　a　long　period.