本文讨论了多输入多输出系统参数的集员辨识（ｓｅｔｍｅｍｂｅｒｓｈｉｐｉｄｅｎｔｉｆｉｃａｔｉｏｎ）．在系统动态噪声功率有界的假定下导出了ＭＩＭＯ系统参数的成员集合是个椭球，证明在一定条件下椭球趋向于一点．文中的仿真例子验证了上述结果． This paper discusses setmembershipidentification of MIMO parameters. Under the assumption that the power of system dynamic noise is bounded, the set of members derived from the MIMO system parameters is an ellipsoid, which proves that under certain conditions, the ellipsoid tends to a little. The simulation example in the paper verifies the above results.