An　effective　method　to　improve　optical　properties　of　perovskite　CsPbI3/Br3　is　a　long-term　goal　pursued　by　re-searchers,　such　as　incorporating,　mechanism　changing　and　structure　optimizing.　However,　two　significant　problems　still　facing　challenges　including　the　complex　fabrication　process　and　low　modulation　efficiency.　To　contribute　these,　a　method　of　ionic　liquid　modulation　with　respect　to　the　photoluminescence　PL　intensity　and　peak　position　was　demonstrated.　The　micro-structure　including　the　information　of　crystal　and　bond　in　MAPbBr3/　I3　soaking　in　C8H11F3N2O2　and　C7H13N2　center　dot　BF4　was　supported　by　x-ray　diffraction　XRD　patterns　and　Raman　spectrum.　A　cube-like　shape　and　size　distribution　mostly　in　600-950　nm　was　imaged　by　scanning　electron　mi-croscope.　Then,　compared　with　CsPbI3　before　soaking　in　Hall　measurement,　the　carrier　concentration　was　improved　about　46.1%,　the　mobility　and　resistivity　were　lowered　around　39.2%　and　40.2%,　respectively.　The　modulation　of　intensity　and　peak　position　were　confirmed　by　PL　spectrum　at　room　temperature.　The　absorption　enhancement　in　excited　state　absorbs　range　was　proved　by　transient　absorption.　Finally,　the　mechanism　for　optical　modulation　in　this　paper　was　systematically　explained.　The　research　method　proposed　in　this　paper　can　simplify　the　research　process　and　improve　the　optical　properties　of　the　materials　at　the　same　time.