Name resolution mechanism is a very important field in the research of mobile agent technology. At present, for complexity of the algorithm, it is difficult for most traditional DNS-based name resolution mechanisms to implement position independent access of mobile object at application level. But it is convenient to construct communication model and navigation model for mobile agent system using global and position independent name resolution. In order to build a global/universal naming method and resolve position transparent problem at application level in mobile agent system,a name resolution mechanism--UON(universal object naming)is presented in this paper.Finally the detailed inolenebtation and the related algorithm are desctibed in three aspects(object registration,object move and mobile object access).