The invention discloses an intelligent detection balance lifting mechanical arm device which comprises a base, a motion framework, a first supporting plate, a second supporting plate and a third supporting plate. A first servo motor is fixedly arranged above the center of the first supporting plate, and an output shaft of the first motor penetrates through the second supporting plate and is fixedly connected with the third supporting plate through a coupling. A stand column is fixedly arranged on the third supporting plate, a fifth supporting plate is fixedly connected to the top of the standcolumn, and a fourth supporting plate is further arranged between the fifth supporting plate and the third supporting plate. A direct current motor is fixedly arranged on the fifth supporting plate, an output shaft of the direct current motor is connected with a first lead through vertically and downwards through a coupling, and the first lead screw penetrates through the fourth supporting plate.A mechanical arm is fixedly arranged on the fourth supporting plate and comprises a horizontally-placed cross beam, a grabbing device arranged at one end of the cross beam and a balancing weight device arranged at the other end of the cross beam. The first lead screw penetrates through the cross beam, and a pressure sensor is arranged on the grabbing device. By means of the intelligent detection balance lifting mechanical arm device, the work efficiency and work quality of boxing or stacking of products in industrial production can be greatly improved; and through the balancing weight device,the situation that machine deformation and wear are caused due to uneven stress of the mechanical arm during work can be effectively reduced, the device can adapt to different grabbing environments, the weights of balancing weights can move intelligently, and automatic balancing of the mechanical arm can be achieved.