Abstract: Put forward a kind of variable frequency triangle interpolation constant temperature control based on strategy.Establish a set of fungus activation based on the ARM processor hardware system, through the temperature sensor real-time transfer temperature, temperature, using a triangle interpolation of frequency conversion technology, control the temperature of the temperature control system, calculation of temperature change, subtle through wavelet interpolation calculation, achieve the regulation frequency constant temperature.Practice shows that this method can greatly reduce temperature fluctuations, makes subtle activate blinking bacteria to increase the number of satisfactory results have been obtained.