Problem to be solved. To provide a detection system and a detection method for quickly and reliably detecting blowout of an internal pressure adjusting regulator in a continuous mixer aeration apparatus. Solution. A detection system includes a gas flow rate measuring unit for measuring a flow rate of compressed air injected into an internal pressure adjusting regulator, and a control unit for controlling an operation of the entire detection system. The control unit includes a data memory part for sequentially taking in measurement data from the gas flow rate measuring unit, and editing/storing the data as a time-series data group, an arithmetic processing part for processing a temporal change in the gas flow rate by a predetermined arithmetic method on the basis of the measurement data preserved in the memory part, and a signal output part for outputting a predetermined detection/control/warning signal on the basis of a result of the...