In　this　work,　we　discovered　an　unexpected　mechanoluminescence　(ML)　phenomena　occurring　when　transforming　amorphous　into　crystalline,　due　to　the　stress-induced　precipitation　of　CsPbBr　3　perovskite　nanocrystals　on　glass　surface.　It　is　revealed　that,　unlike　the　conventional　thermal-induced　phase　transformation　mechanism,　the　breakage　of　bonding　of　glass　network　provides　the　energy　for　nucleation　and　growth,　and　the　shear　stress　avoids　the　long-range　migration　of　structural　units　for　crystallization.　Such　unique　ML　phenomenon　enables　the　visualization　of　dynamical　force　that　is　inaccessible　by　common　strategy,　and　so,　opens　up　some　novel　applications,　such　as　the　pressuresensitive　“glassy　pencil”　to　learn　people’s　writing　habits,　and　the　Pb　2+　-detection　with　good　sensitivity　and　selectivity.　These　findings　not　only　demonstrate　an　effective　route　for　the　preparation　of　perovskite　materials　in　a　green,　time-saving,　low　cost,　and　scalable　way,　enrich　the　knowledge　of　glass　crystallization　mechanism,　but　also　exploit　a　useful　avenue　to　quantitatively　visualize　the　dynamical　force.　[Figure　not　available:　see　fulltext.].　©　2019,　Tsinghua　University　Press　and　Springer-Verlag　GmbH　Germany,　part　of　Springer　Nature.