This　paper　discusses　the　exact　observability　and　stability　of　the　stochastic　implicit　systems.　Firstly,　the　conditions　for　the　existence　and　uniqueness　of　the　impulse　solution　to　stochastic　implicit　systems　are　given　by　stochastic　Laplace　transform.　Secondly,　the　necessary　and　sufficient　conditions　for　the　exact　observability　of　stochastic　implicit　systems　are　derived　by　the　matrix　theory.　Thirdly,　the　application　of　exact　observability　of　the　stochastic　implicit　systems　to　its　stability　is　discussed　and　sufficient　conditions　for　the　stability　of　systems　considered　are　derived　in　terms　of　linear　matrix　inequalities.　Finally,　some　examples　are　given　to　illustrate　the　effectiveness　of　the　obtained　theoretical　results.　©　2021　Elsevier　B.V.