Man-machine intelligent working system (MMIWS) is a kind of system that interfuses human intelligent and machine intelligent with the addition of working ability and can deal with the indeterminate operation tasks in the structureless environment. One of example is the partial grinding robot that will be used in iron and steel plants. There are scars and blemishes on the steel ingots or billets after rolling which must be clear away by grinding. These tasks of operation can not determined in advance because scars or blemishes on the surface of each billet to be grinding are vary in distribution, shape, size, depth and quantity. In the Man-machine intelligent working systems, the human intelligent can entered into the system at every levels such as task plan level, path program level, motion control level and so on, so that two kinds of intelligent of the human and machine can be combined nicely.