Standby　is　a　technique　that　has　been　widely　applied　to　improve　system　reliability　and　availability　in　the　stage　of　system　design.　For　satellite　control　system,　it　requires　features　of　high　reliability,　security　and　sustainability.　In　this　paper,　we　design　a　dual-system　warm　standby　technology.　The　system　consists　of　double　control　servers,　one　is　operating　control　server　and　another　one　is　standby　control　server.　Dual-system　warm　standby　log　files　use　differential　ghost　method　that　can＇t　only　strengthen　log　real-time　but　also　reduce　network　usage.　Erasing　log　files　after　the　operation　is　completed　that　can　reduce　reliance　on　storage　memory.　When　switching　to　backup　server,　according　to　the　dual-system　warm　backup　log　files,　it　can　recover　the　current　mission　progress　and　continue　to　run　the　mission.　Through　experimental　verification,　the　design　has　a　good　reliability　and　stability.　It　can　be　widely　used　in　aerospace　field　test.