Abstract: Temperature field and residual stress field of P92 steel multi-layer and multi-pass welded joint were studied by the finite element simulation method of thermal-metallurgical-mechanical computational procedure considering solid-state phase transformation via SYSWELD software. The morphology of joint section was observed. Residual stress was measured by hole-drilling method, and the simulated results were verified. The change of residual stress in the joint was also investigated by finite element simulation. The results show that simulated maximum temperature profile shape of the joint section was in good agreement with the morphology of weld and heat affected zone obtained by test, indicating that the finite element simulation could well restore the heat input during actual welding process. The simulated residual stress had a symmetrical distribution along weld center, and matched tested results well, indicating that the finite element simulation method could accurately predict the residual stress in P92 steel multi-layer and multi-pass welded joint. Partial metal in weld and heat affect zone softened after undergoing continued thermal cycles during multi-layer and multi-pass welding, leading to residual stress relief and then residual stress redistribution during cooling process.