NOVELTY - The cooling and heating system, where spaces are heated and cooled using the heat-conducting fluid such as heat boron, which forms a substance, comprises an internal unit that is installed in the space to be cooled or heated, and an external unit that dissipates heat at a high temperature. The inner unit is the evaporator to the outer sides of which heat-conducting ribs are applied. An electrical heating rod and a ventilator are also provided in the housing. A thermostat is connected to the electric heating rod and the ventilator is applied to the housing of the inner unit.    USE - Cooling and heating system useful for motor vehicle.    ADVANTAGE - The cooling and heating system ensures to operate the vehicle with less consumption of fuel.    DETAILED DESCRIPTION - The cooling and heating system, where spaces are heated and cooled using the heat-conducting fluid such as heat boron, which forms a substance, comprises an internal unit that is installed in the space to be cooled or heated, and an external unit that dissipates heat at a high temperature. The inner unit is the evaporator to the outer sides of which heat-conducting ribs are applied. An electrical heating rod and a ventilator are also provided in the housing. A thermostat is connected to the electric heating rod and the ventilator is applied to the housing of the inner unit. An electronic regulator is mounted in order to regulate the time and temperature. The external unit is the condenser to the outer sides of which heat-conducting ribs and a ventilator are applied. The system contains a compressor for increasing pressure. The compressor has slight energy requirement, low dimensioning and low noise level through the favorable thermodynamic characteristics. The heat-conducting ribs of the compressor and the condenser consist of double-walled materials and are filled with heat conducting fluid for better heat transmission. The cooling- and heating system are operated based on low energy requirement with solar cells. The required energy is available through battery for regulation. The external and internal units of the cooling- and heating system are constructed in a housing together to cooling- and heating roll. The mixing ratio is 1-67 % to 33-99% and the substances are listed for the component of 80-99 wt.% and are combined within percentage among one another, where 1-25% of the ambient air is filled to other substances.