PSⅠ, PSⅡand light-harvesting complexes (LHC) in oxygen evolving photosynthetic organisms were reviewed. These organisms include cyanobacteria, red algae, brown algae, diatoms,chrysophytes,dinophytes, xanthophytes,crypophytes,green algae and green plants.The diversity of pigment-protein complexes that fuel the conversion of radiant energy to chemical bond energy was highlighted, and the evolutionary relationships among the LHC structural polypeptides and the characteristics of the fluorescence emission of PSⅠat 77 K was discussed.