The invention relates to a repairing and maintaining method for a blast furnace lining, in particular to a remote-control thermal-state wet-process injection lining making method. The remote-control thermal-state wet-process injection lining making method comprises the following steps that S1, equipment enters a site, specifically, a spraying manipulator is mounted in a blast furnace and is connected with an injection workstation outside the blast furnace in a matched manner; S2, banking fire is performed, specifically, the internal environment of the blast furnace is adjusted; S3, cleaning is performed, specifically, washing is performed on to-be-repaired positions of the inner wall of the blast furnace for multiple times so as to perform spraying, repairing and lining making; S4, injection is performed, specifically, the spraying manipulator is controlled to perform spraying repairing on the inner wall of the blast furnace; S5, the furnace is dried, specifically, hot air is supplied into the furnace to bake the interior of the blast furnace; and S6, the furnace is opened, specifically, the furnace is opened for normal production after the interior of the furnace reaches a specified state. By means of the remote-control thermal-state wet-process injection lining making method, the hot repair efficiency of the blast furnace can be rapidly improved and the service life of the blast furnace can be prolonged to the maximum extent during the damping-down time of the blast furnace, particularly gunning in a hot state.