The invention relates to a remote-control automatic maintenance device and a remote-control automatic maintenance method, in particular to a remote-control automatic maintenance device and a remote-control automatic maintenance method for targets in a hot room environment. The remote-control automatic maintenance device for the targets mainly comprises a closed hot room, an upper crown block, a lower crown block, a power manipulator and stereoscopic vision devices; inlet covers are mounted on the top of the closed hot room, the upper crown block and the lower crown block are abutted to two side walls of the closed hot room under the effect of pressing force, and the power manipulator is mounted below sliders of the lower crown block; the stereoscopic vision devices are potable cameras mounted on the side walls of the closed hot room, the crown blocks, the power manipulator and the inside of the closed hot room. The remote-control automatic maintenance device and the remote-control automatic maintenance method have the advantages that the remote-control maintenance efficiency and the remote-control maintenance intelligence can be improved by means of combining a stereoscopic vision technology with the power manipulator, the stereoscopic vision devices are mainly responsible for three-dimensionally reconstructing maintained objects and creating coordinate relations among the maintained objects and the power manipulator, and the power manipulator is used for maintaining or repairing the remotely-controlled maintained objects.