Abstract: Investigates the reconfigurable microassembly technology and functional configuration. Taking precise microminiature mechanical systems as assembly objects, the reconfigurable 12 degree of freedom(DOF) microassembly technology and realization method are systematically proposed, including modules such as 6-DOF macro-robot, 6-DOF precise micromotion worktable, micro gripper integrated micro detection and feedback, and micro pose detection device, and so on. Corresponding microassembly system is developed, and the assembly of micro axis and gear is successfully realized by pose and gripping information measured. The reconfigurable 12-DOF microassembly technology provides a new thought and method for assembling precise microminiature mechanical system.