We　propose　a　scheme　to　test　Bohr　complementarity　with　cold　ions　confined　in　a　linear　trap.　In　the　scheme　two　ions　are　first　prepared　in　a　maximally　entangled　state　via　the　excitation　by　laser　fields.　Then　one　ion　of　the　correlated　pair　is　driven　by　a　resonant　laser.　The　path　information　of　this　ion　to　reach　one　definite　state　is　recorded　on　the　other　ion　and　thus　the　probability　of　finding　the　first　ion　in　a　definite　state　does　not　exhibit　interference.　The　associated　quantum　eraser　can　also　be　realized.