Photocatalytic　technology　is　considered　as　one　of　the　most　attractive　and　promising　technologies　to　directly　harvest,　convert　and　store　renewable　solar　energy　for　generating　sustainable　and　green　energy　and　a　broad　range　of　environmental　applications.　However,　the　use　of　a　photocatalyst　in　powder　or　coating　forms　restricts　its　applications　due　to　its　disadvantages,　such　as　difficulty　in　recovery　of　nano-powder,　secondary　pollution,　low　adhesion　between　photocatalytic　coating　and　substrate　material,　short　service　life　of　photocatalytic　film　and　so　on.　The　investigation　and　application　of　photocatalytic　glass-ceramics　(PGCs)　in　water　purification,　bacterial　disinfection,　self-cleaning　and　hydrogen　evolution　have　received　extensive　attention　due　to　their　inherent　advantages　of　low　cost,　easy　fabrication,　transparency,　chemical　and　mechanical　stability.　Real-time　solutions　to　energy　shortage　and　environmental　pollution　faced　by　the　development　of　human　society　can　be　provided　by　rationally　designing　the　chemical　composition　and　preparation　methods　of　glass　ceramics　(GCs).　This　review　introduces　the　concept　and　crystallization　mechanism　of　PGCs　and　expounds　on　the　basic　mechanism　of　photocatalysis.　Then,　the　key　point　difficulties　of　GCs＇　design　are　discussed,　mainly　including　the　methods　of　obtaining　transparency　and　controlling　crystallization　technologies.　Different　modification　strategies　to　achieve　better　photocatalytic　activity　are　highlighted.　Finally,　we　look　forward　to　further　in-depth　exploration　and　research　on　more　efficient　PGCs　suitable　for　various　applications.