Metal chalcogenide supertetrahedral clusters (MCSCs) are of significance for developing crystalline porous framework materials and atomically precise cluster chemistry.Early research interest focused on the synthetic and structural chemistry of MCSC-based porous semiconductor materials with different cluster sizes/compositions and their applications in adsorption-based separation and optoelectronics.More recently,focus has shifted to the cluster chemistry of MCSCs to establish atomically precise structure-composition-property relationships,which are critical for regulating the properties and expanding the applications of MCSCs.Importantly,MCSCs are similar to Ⅱ-Ⅵ or Ⅰ-Ⅲ-Ⅵ semiconductor nanocrystals (also called quantum dots,QDs) but avoid their inherent size polydispersity and structural ambiguity.Thus,discrete MCSCs,especially those that are solution-processable,could provide models for understanding various issues that cannot be easily clarified using QDs.This review covers three decades of efforts on MCSCs,including advancements in MCSC-based open frameworks (reticular chemistry),the precise structure-property relationships of MCSCs (cluster chemistry),and the functionalization and applications ofMCSC-based microcrystals.An outlook on remaining problems to be solved and future trends is also presented.