High Temperature Gas-cooled Reactors are recognized as a representative advanced nuclear system for the future owing to the excellent safety performance, high efficiency, multipurpose uses and hydrogen production. These type reactors are characterized by ceramic coated particle fuel, inert helium as coolant, and graphite used as moderator and reflector in core, which makes the outlet temperature of coolant reaching 950℃ even more. Under the National High Technology Program, the HTR10 project has been successfully implemented and achieved full power operation in connection with the grid in January of 2003. HTR10, which is the first module HTR with inherent safety feature around world, has carried out safety demonstration tests simulating the severe accident conditions in 2004.Based on the proven technologies and experience feedback during HTR10 design, manufacture, construction and operation, a HTRPM demonstration power plant with 200MWe power capacity sited at Rongcheng of Shandong province has been initiated.