Resistance therma noise measurement needs to shield the environmental noise interference from themeasurement.Through remote measurement of noise with a frequency sweep mode,it is found that there wasobvious characteristics of environmental noise higher in strength than the thermal noise in the teachinglaboratory even nobody was there.On the other hand,the thermal couples local near the resistor to measure itstemperature can introduce environmental noise to the measurement even it was in the shutdown state.Therefore ,a sample box with capacities of high noise-shielding and temperature-measurement of the resistor atthe same time becomes the key to the resistance thermal noise measurement at variable temperatures.Combinedwith the A-B common mode input of a lock-in amplifier and the input bandwidth correction ,a sample box withthe thermal couple outside the shielding box but with good thermal contact with the resistor is developed forteaching experiment,which produces desired result.