The present invention relates to a fresh air and fresh air intake ventilation system for high filtration efficiency and energy saving, by selectively filtering the air, outdoor air and mixed air to the room, while saving energy related to indoor cooling and heating The present invention relates to a high-filtration efficiency and energy-saving air purifying ventilation system for improving the filtration efficiency and creating a comfortable indoor environment.;According to the present invention, the outside air intake port connected to the duct and the outside air flows in, the inside air intake inlet, the partition for separating and separating the outside air intake port and the inside air intake to supply the indoor air and bet A main body having a blowout opening therein; A first damper installed at a bottom surface of the outside air intake port to allow the outside air to flow in and out; A first filter installed inside the main body to filter the outside air introduced through the outside air inlet; And a second filter installed inside the main body to filter the internal air introduced through the internal air suction port, and a high air efficiency and internal air intake air purifying ventilation system for energy saving.
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