Abstract: This paper mainly studies the standard system of the third generation nuclear power technology HPR1000, and emphasizes on the top level design of the standard system. Firstly the paper summarizes the current standard situation adopted in HPR1000, specifies the standard system study area, and primarily establishes the framework construction of standard system, and then puts forward a systematic analysis method of HPR1000, and explains the analysis process with the general design as an example, so as to provide necessary study bases on the top level design of the standard system and provides suggestion to further find out the relationship among HPR1000 standards.