The installation of tapping parts and tapping valves for water pressure, water level and analyzing of the systems relate with water pressure system must be finished and the related instrument pipeline shall have been laid as possible. The installation of sockets of temperature-measuring components and plug-in temperature-measuring components related with water pressure must be finished. The welding of heat collection piece of metal wall temperature at boiler drum, superheater and reheater etc. must be finished, the temperature components must have been installed. Before entire air pressurizing to the boiler, the work to be accomplished are that the instrument pipelines for sampling devices of total air pressure have been laid and the sealing test of the instrument pipeline has been tested. The temperature-measuring components of the flue duct have been installed and the wiring is correct. The gas analyzing and sampling devices have been installed. The baffle of the flue gas and air system as well as the damper actuator related with air pressure mush be wired and tested.