We　propose　an　alternative　adaptation　method　based　on　belief　rule-base　to　solve　the　problem　of　applying　the　case-based　reasoning　to　generate　the　emergency　alternative.　First,　the　most　similar　historical　case　with　the　target　case　is　obtained　according　to　the　retrieval　method,　after　which　the　problem　difference　values　between　the　historical　cases　and　the　most　similar　case　are　computed.　Second,　the　problem　difference　values　are　transformed　into　the　belief　degree　form　of　evaluation　grade.　Next,　the　information　of　historical　cases　and　the　learning　model　are　then　used　to　determine　the　parameter　of　the　belief　rule-base.　Furthermore,　the　problem　value　difference　between　the　target　case　and　the　most　similar　case　is　transformed　into　the　belief　degree　form　of　evaluation　grade.　On　the　basis　of　this　finding,　the　alternative　of　the　target　case　is　gained　through　the　inference　rules　of　the　belief　rule-base.　Finally,　an　illustrative　example　of　environmental　emergency　rescue　is　provided　to　demonstrate　the　feasibility　and　validity　of　the　proposed　method.