The　evacuation　process　from　a　supermarket　under　good　and　limited　visibility　is　investigated　by　a　group　of　experiments　and　questionnaires.　The　evacuations　in　both　situations　are　compared　to　explore　their　differences.　Some　typical　behaviors　such　as　following　behavior,　helping　behavior　and　finding　the　dependent　during　evacuation　under　limited　visibility　are　observed　from　the　experimental　video.　The　reduced　visibility　hinders　pedestrian　movement　and　prolongs　evacuation　process.　As　a　result,　pedestrians　need　more　time　to　evacuate　from　the　supermarket　under　limited　visibility.　However,　a　similar　point　is　that　pedestrians　prefer　to　select　the　closest　exit　and　minimize　their　movement　distances　in　both　situations.　A　multi-grid　model　considering　these　typical　behaviors　is　proposed　to　simulate　pedestrian　evacuation　under　both　conditions　and　simulation　results　agree　well　with　the　experiment　results.　Finally　simulations　with　and　without　obstacles　inside　are　compared　to　study　the　effect　of　obstacles　on　evacuation　time.　The　study　is　helpful　to　understand　pedestrian　behavior　and　develop　efficient　evacuation　strategy　to　guide　pedestrian　evacuation　under　limited　visibility.