In order to meet the need of multi-station or multi-craft laser processing, with the Nd:YAG pulse laser as the optical source, a double-station processing system is developed. A double-station processing implementing scheme is proposed, and then a light-splitting device that can change the laser path in real time is designed. As well as a control circuit of the whole system, and the workflow, work time sequence of the system is worked out. Finally, a double-station system is realized, and it can provide the same output power as which of the single-station one. To test the processing result of the system, the cladding and welding experiments are respectively carried out on AZ91D magnesium alloy and 3003 aluminum alloy. With the help of scanning electron microscope(SEM) and the measuring system of electrochemistry, the features and corrosion resistance of the interface between the coating of cladding sample and the substrate are tested respectively. Besides, the microhardness and tensile property of the welding sample are tested. The results show that after cladding, the clad layer integrates well with the substrate and is compact in texture without cracks or holes. The self-corrosion potential is higher than the substrate by 1.18V and corrosion current is lower by 5 orders of magnitude. It also shows that the processing results are quite good after welding, with the hardness of aluminum alloy varying from HV4.927 to 54 and the tensile strength reaching 82.3% of that of the parent metal. And the process efficiency is improved by 24.6% compared with the single station processing system.