The invention discloses an intelligent family environment control method and 
system. The method comprises the following steps that the 
air pollution threshold value is preset; the user position is positioned in real time, the user speed is monitored, and the 
user state and the leaving distance are judged; and the 
indoor air quality is monitored in real time, purifier start control is conducted according to the 
user state, when a user is at home and the air quality exceeds the 
air pollution preset threshold value, a purifier is started, when the user leaves the home or the air quality does not reach the 
air pollution preset threshold value, the purifier is stopped, and when the user returns home, the needed 
air purification time is judged according to the current 
indoor air quality, the needed home returning time is calculated in combination of the user leaving distance and speed, the purifier 
start time is judged in combination of the needed 
air purification time and the needed user home returning time, and air in a room is purified when the user returns home. Through 
intelligent control, the user can enjoy the purified air all the time, and 
power saving and energy saving can be achieved with the 
maximum efficiency.