A genetic testing method comprising: independently controlling temperatures of a plurality of reaction tubes, each accommodating an amplification liquid including a target nucleic acid to be amplified and a component necessary for amplification, using a thermostat, a temperature detecting device, and a heating and cooling device additionally provided on each of the reaction tubes; hermetically sealing and stirring the reaction tubes; controlling temperature at individual positions to hold the reaction tubes at a predetermined temperature set at the individual positions according to an analysis and testing protocol predetermined at individual positions of the reaction tubes; monitoring a controlled temperature value in a unit of the reaction tube and computing and storing a corrected value of controlled temperature in a unit of the reaction tube; controlling temperatures of the reaction tubes based on the stored corrected value, wherein when a controlled temperature value of a specific reaction tube exceeds a normal range of stored corrected temperature values in the course of a testing and detecting step, a function of a temperature control unit of the reaction tube is stopped and remaining reaction tubes that converge on the normal range are used to continue analysis or testing; measuring light emission of the amplification liquid accommodated in the reaction tube; disposing of the reaction tube in a disposal box after finishing the measurement of light emission of the amplification liquid; and displaying simultaneously on a screen of an apparatus a monitored value of controlled temperature stored on a monitored temperature value storage unit and a value of measured data of a light emission detecting unit stored on a measured data storage unit, so that they are compared with each other in a time series. independently controlling temperatures of a plurality of reaction tubes, each accommodating an amplification liquid including a target nucleic acid to be amplified and a component necessary for amplification, using a thermostat, a temperature detecting device, and a heating and cooling device additionally provided on each of the reaction tubes; hermetically sealing and stirring the reaction tubes; controlling temperature at individual positions to hold the reaction tubes at a predetermined temperature set at the individual positions according to an analysis and testing protocol predetermined at individual positions of the reaction tubes; monitoring a controlled temperature value in a unit of the reaction tube and computing and storing a corrected value of controlled temperature in a unit of the reaction tube; controlling temperatures of the reaction tubes based on the stored corrected value, wherein when a controlled temperature value of a specific reaction tube exceeds a normal range of stored corrected temperature values in the course of a testing and detecting step, a function of a temperature control unit of the reaction tube is stopped and remaining reaction tubes that converge on the normal range are used to continue analysis or testing; measuring light emission of the amplification liquid accommodated in the reaction tube; disposing of the reaction tube in a disposal box after finishing the measurement of light emission of the amplification liquid; and displaying simultaneously on a screen of an apparatus a monitored value of controlled temperature stored on a monitored temperature value storage unit and a value of measured data of a light emission detecting unit stored on a measured data storage unit, so that they are compared with each other in a time series.