The device used to measure the changes in the thoracic temperature of locusts in response to spectral light. The above of opaque shielding box (length×width×height: 60 mm×40 mm×60 mm) was opened to place and adjust the investigated locust in box. After making locusts head extend out a Φ10 mm hole in the right side of the box, investigated locust was fixed in the bottom of the box, and the temperature probe of SENDAE thermometer was placed on the thorax through a Φ5 mm hole in the bottom of box. LED light source was supplied by 12 V DC adjustable power to provide different intensity of spectral light stimulation (UV, violet, orange light). The stimulating illumination (100 lx, 1000 lx of UV, violet, orange light, 10000 lx orange light), and the same light energy (for 1500 lx, 2000 lx, 43100 lx of UV, violet, orange light, respectively, corresponding to 12 V supply voltage with the same power supply current), accept by locusts visual system, was obtained through adjusting the supply voltage and the distance between light source and locusts visual system, respectively. The thoracic temperature of locusts in response to spectral light and no spectral light was recorded by SENDAE thermometer.