Abstract: Mnltiobjective two-level decision problem is very complex and practical in real wordl.In this paper,two kinds of decision mechanism are studied for the problem,which are cooperation decision mechanism and independent decision mechanism.Their decision solutions are demonstrated to equivalent to solve multiobjective program with implicik constraints.Their noninferior soluronset can be represented by the augmented weighted Tchebycheff norm problem.And an effective intractive decision making method can be designed by using steuer-choo approach for support the mult:objeticve two-level decision making.

Key words: Two-level, Multiobjative, interactive, decision making