The present invention is an energy efficient air purification system 100 for purifying a complex polluted environmental air condition. The air purification system 100 includes a plurality of air pollution monitoring units MU1, MU2, MU3, MU4 . . . MUN which are installed at distant locations, a plurality of air purification units PU1, PU2, PU3, PU4 . . . PUN which are installed at distant locations and an automated control unit 500. The air pollution monitoring units are adapted to monitor the quality of the air in their surroundings. Upon such monitoring, the air pollution monitoring units are adapted to communicate the air quality data to the automated control unit 500. The automated control unit 500 is adapted to analyze the air quality data and on basis of such analysis, the automated control unit 500 further instructs the air purification units for further action.