Miyun　Reservoir　Regulating　and　Storage　Project　for　incoming　water　from　South-to-North　Water　Diversion　Project　is　the　key　content　of　Beijing　matching　constructions,　and　the　former　part　of　the　project　transfers　water　from　Tuanchenghu　Lake　to　Huairou　Reservoir　through　six　pumping　stations.　To　achieve　the　goal　of　efficient　and　economical　operation,　a　large　system　decomposition-coordination　model　is　established　to　solve　the　problem　of　daily　optimized　dispatching　and　economic　operation　of　this　project　based　on　the　rule　of　time-of-use　power　price　in　Beijing.　The　large　system　is　divided　into　three　sub-systems.　Firstly,　it　adopts　the　Dynamic　Programming　method　to　realize　optimization　of　each　subsystem,　and　then　realizes　global　optimization　of　the　large　system　according　to　the　overall　goal　of　the　large　system　and　the　relationship　among　three　subsystems.　The　results　show　that　the　model　has　strong　practicability,　allotting　more　rate　of　flow　in　the　period　of　low　price,　which　is　of　significance　for　the　guidance　of　efficient　and　economical　operation　of　the　project.　©　2016,　China　Water　Power　Press.　All　right　reserved.