The invention relates to an environment control system which comprises an air purification device, a controllable gas delivery device and an environment regulation device. The air purification device is disposed inside a building. The controllable gas delivery device and the environment regulation device are disposed inside the air purification device. Compared with the prior art, the environment control system creates a 'house-in-house' environment beneficial to human physiological and mental health to achieve health caring. The indoor environment created by the environment control system includes factors such as temperature, humidity, cleanliness, freshness, oxygen concentration, anion concentration, luminance, air velocity, air uniformity, noise, color, music, fragrance, air pressure and electromagnetic wave, and accordingly the problems of indoor air pollution and low indoor air quality are solved substantially. The environment control system cares human health.