Elastic　vibration　is　inevitably　caused　during　movement　of　flexible　arms,　so　the　vibration　suppression　has　become　an　important　topic.　For　a　vibration　suppression　system　basing　on　PZT　and　fuzzy　control　theory,　vibration　information　can　be　detected　using　resistance　strain　sensor　and　collected　into　computer　system　through　dynamic　strain-gauge.　Then　fuzzy　operation　is　carried　out　according　to　fuzzy　control　laws,　following　that　control　voltage　is　determined.　Finally,　the　PZT　is　driven　with　the　voltage　to　produce　a　control　torque　opposite　to　the　vibration　direction　and　the　flexible　deformation　is　suppressed.　Experimental　results　show　that　the　PZT　can　suppress　the　elastic　vibration　significantly,　and　the　fuzzy　control　itself　is　robust.