NOVELTY - Photosynthetic microorganisms culturing system (1) includes a solar panel (2) adapted to collect the photons brought by the solar radiation, a culture zone (3) containing culture medium of the photosynthetic micro-organisms to cultivate, a circuit (4) of coolant in which phosphorescent particles of luminophores are in suspension, the circuit connects the sensor to the zone of culture, a heat exchanger (5) adapted to control the temperature of the fluid in the zone of culture, a light radiation adapted to the culture of photosynthetic micro-organisms.    USE - Used as photosynthetic microorganisms culturing system.    ADVANTAGE - The system improves the output of the culture of photosynthetic micro-organisms; achieves simultaneous production of heat which can be developed in various possible forms, in particular for medical production of warm water, air-conditioning by thermodynamic cycle, heating of greenhouses or buildings, and for desalination of sea water; increases the productivity of the microalgae; solves low voluminal productivity and bad control of the culture conditions; can culture under better controlled conditions; and avoids the contaminations, pollution, and carbon dioxide losses.    DETAILED DESCRIPTION - Photosynthetic microorganisms culturing system (1) includes a solar panel (2) adapted to collect the photons brought by the solar radiation, a culture zone (3) containing culture medium of the photosynthetic micro-organisms to cultivate, a circuit (4) of coolant in which phosphorescent particles of luminophores are in suspension, the circuit connects the sensor to the zone of culture, a heat exchanger (5) adapted to control the temperature of the fluid in the zone of culture, in which the particles, having collected the photons in the sensor and suspension in the fluid at the controlled temperature, are intended to re-emit in volume of the zone of culture, a light radiation adapted to the culture of photosynthetic micro-organisms. An INDEPENDENT CLAIM is also included for:    (1) using the heat output of the heat exchanger of the culture system for producing domestic hot water, for air conditioning by the thermodynamic cycle system or by absorption, for heating greenhouses or building, for desalination of sea water; and    (2) use of phosphorescence culture system particles for visible posting by the naked eye, especially at night, luminous slogans and/or logos, in particular for advertising purposes.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the photosynthetic microorganisms culturing system.    Culturing system (1)    Solar panel (2)    Culture zone (3)    Circuit (4)    Heat exchanger (5)