Abstract: In order to carry out underwater Welding technology research onshore,the author presents a technical plan for making a 0-30 bar underwater welding simulated chamber,equipped with hydraulic and microcomputer controlled manipulators.It is quite properto use hydraulic servomechanism in adverse circumstances of combustibles or explosive,and of high temperature or high pressure.The author makes a detail feasibility demon-stration of some required measures and the monitoring &.inspection systems.