The invention relates to the field of robot equipment, and discloses an automatic production and assembly system based on an intelligent industrial robot. The automatic production and assembly systemcomprises a bottom plate, wherein a welding manipulator is fixedly arranged on the bottom plate, and a small wheel set is arranged below the bottom plate; the welding manipulator which linearly movesalong a first guide rail group is arranged on a first rack and the first guide rail group, the welding manipulator comprises a welding platform, supporting legs are arranged below the welding platform, the supporting legs are arranged on the first guide rail group in a sliding mode, an output shaft of a first motor is coaxially connected with a first gear, the first gear and the first rack mesh with each other, a mounting rod is arranged on one side of the first motor, a supporting wheel is arranged at the bottom of the mounting rod, and the supporting wheel is in rolling contact with the bottom plate; a rotating disc is installed on the welding platform, a gear ring is arranged outside the rotating disc in a sleeving mode, the inner side surface of the gear ring is in interference fit with the outer side surface of the rotating disc, and the gear ring meshes with a second gear. The automatic production and assembly system has the advantages of being wide in application range, low in cost, accurate in transmission control and the like.