The invention discloses a constant-temperature caponette raising device and a constant-temperature caponette raising method and particularly relates to the field of livestock breeding. The constant-temperature caponette raising device comprises a raising box for accommodating caponettes and a box cover matched with the raising box and further comprises a temperature control device for controlling the temperature in a box body and a guiding device for guiding warm flow to enter the raising box, wherein the raising box, the guiding device and the temperature control device are sequentially arranged in the vertical direction. A caponette partition plate is put at the bottom of the raising box and is provided with a through groove for facilitating discharge of caponette excrement. The guiding device consists of multiple concentric guiding rings, wherein the guiding rings are arranged in a high-low staggered mode. The temperature control device comprises a heating device for providing heat, a fan for delivering produced heat to the raising box and a driving device for driving the fan to rotate. The constant-temperature caponette raising device has the advantages of facilitating temperature adjustment and environmental cleanliness and preventing caponettes from infecting with bacteria.