Experiment is carried out to record temperature history of aluminum alloy slab for single aluminum alloy slab and aluminum alloy chamber containing water,both irradiated by 1053nm pulsed laser.Finite element models are set up to simulate the temperature field variation process,and simulation results agree well with the experimental results.Our work shows that the water in the chamber accelerates thermal diffusion process inside the aluminum alloy slab thus delaying the temperature rise inside the slab.