A　bistable　nano-opto-mechanical　memory　is　designed,　fabricated　and　experimentally　demonstrated.　A　doubly-clamped　silicon　beam　is　deformed　by　optical　gradient　force　generated　from　the　ring　resonator.　The　doubly-clamped　silicon　beam　can　be　bended　due　to　attractive　optical　gradient　force　generated　by　ring　resonator.　Due　to　the　non-linear　behavior　of　optical　gradient　force,　the　silicon　beam　has　two　stable　positions　which　can　be　switched　by　controlling　the　light　power　transmitted　inside　the　ring　resonator.　The　nano-size　of　the　memory　enable　for　large　scale　integration,　high　speed　operation　and　low　power　consumption.　It　has　other　potential　applications　such　as　optical　switch,　logic　gate　and　actuator.