The invention relates to a mechatronics grab and relative control method. Said invention comprises: a detecting processor, a memory, a gate dog, a display screen, an acoustic alarm, an optical-electric separate circuit, a high-speed optical-electric separate circuit, a counter, a filter, and a communication circuit. Wherein, the detecting processor is connected to the memory, the gate dog, the display screen, the acoustic alarm, the counter, the filter, and the communication circuit; the optical-electric separate circuit is connected to the filter; the high-speed optical-electric separate circuit is connected to the counter; and it also comprises a motion controller, a moving arm incline sensor, a sharp rod incline sensor, and a hopper incline sensor, while their outputs are connected to the input of motion controller; and the motion controller via communication circuit is connected to the detecting processor. The invention can realize automatic grab control, with high accurate control, accurate positioning and lower energy-consumption.