Based　on　the　idea　of　adiabatic　evolution,　we　propose　two　probabilistic　but　simple　schemes　for　generating　maximally　entangled　states　for　two　distant　atoms　and　concentrating　unknown　atomic　entangled　states.　Taking　advantage　of　adiabatic　passage,　the　atoms　have　no　probability　of　being　excited　and　thus　the　atomic　spontaneous　emission　is　suppressed.　Furthermore,　in　the　two　schemes　accurate　adjustment　of　the　interaction　time　is　not　required.