The invention provides a power station boiler waste heat utilization system based on fume temperature communication control valve. The system comprises an air preheater and a heat storage device, a fourth temperature sensor is arranged in the flue upstream of an upstream valve, the fourth temperature sensor is used for detecting flue gas temperature in the flue, the fourth temperature sensor is indata connection with a central controller, and the central controller controls opening and closing of the upstream valve and a downstream valve based on the data detected by the fourth temperature sensor. Through the operation, when the flue gas temperature meets the requirement, excess heat can be stored in the heat storage device under the condition that the pre-heat generated by the air preheater meets the amount of air, in the absence of flue gas waste heat, the heat stored by the flue gas waste heat is utilized to heat the air preheater so as to meet the actual working requirements of the air preheater, therefore, the flue gas waste heat can be fully utilized, and the situation of excessive heat waste is avoided.