The invention discloses an intelligent variable flow 
water quality control system for circulating 
aquaculture. The intelligent variable flow 
water quality control system comprises a lower computer variable flow 
control system, a lower computer variable flow executing 
system and an upper 
computer monitoring system, wherein the lower computer variable flow control 
system is formed by a 
water quality parameter sensor, a 
transmitter, a controller, a second 
wireless communication module, a frequency converter and an air switch, the lower computer variable flow executing system is formed by a water pump and an aerator, and the upper 
computer monitoring system is formed by a monitoring terminal and a first 
wireless communication module. The lower computer variable flow control system is used for detecting water quality parameters and outputting control signals to the lower computer variable flow executing system, and thus the rotating speed of the water pump is changed to improve the water quality; the upper 
computer monitoring system and the lower computer variable flow control system display and monitor the water quality parameters through 
wireless signal transmission, the aerator is controlled to be opened or closed according to the 
monitoring data, and 
aeration is selected to be conducted on the water of an 
aquaculture pool. By means of the intelligent variable flow water 
quality control system for circulating 
aquaculture, cost can be greatly saved, and 
energy consumption can be lowered; in addition, long-distance communication is conducted through 
the Internet of Things technology based on wireless communication, the water quality is monitored, and higher convenience and higher intelligence are achieved.