Abstract: The recent research techniques of the simulation method for water resources system are improved rapidly due to the enhanced recognition of the system and the development of the related information technology.The development of the integrated simulation system is a trend for the management and planning of water resources.In this paper the current situation and new progress of the simulation techniques for water resources system are introduced briefly.The informatics and computational techniques play very important roles in facilitation of the water-related models.Combined with characteristics of water resources system,the standard conceptualization of a river makes it necessary to construct a general simulation model for the water resources system.Based on the comparison of the different methods and models of simulation,the common concerns of general water system model are summarized and the prospect of future research is put forward.