According　to　the　protocol　of　Agrawal　et　al.,　we　propose　a　cavity　QED　scheme　for　realization　of　teleportation　and　dense　coding.　Instead　of　using　EPR　states　and　GHZ　states,　our　scheme　is　more　insensitive　to　the　loss　of　one　particle　by　using　a　W-class　state　as　a　quantum　channel.　Besides,　our　scheme　is　immune　to　thermal　field,　and　does　not　require　the　cavity　to　remain　in　the　vacuum　state　throughout　the　procedure.