The invention discloses a temperature-constant and drying intelligent cabinet for placing electric power safety instruments and a using method. The temperature-constant and drying intelligent cabinet comprises an instrument cabinet body. An insulated instrument cabinet is arranged in the instrument cabinet body, a self-protecting equipment cabinet is arranged on one side of the insulated instrument cabinet, a protective tool cabinet is arranged on one side of the self-protecting equipment cabinet, and a construction equipment cabinet is arranged on one side of the protective tool cabinet; a safety system used cabinet is arranged on one side of the construction equipment cabinet, movement areas are arranged on the front sides of the insulated instrument cabinet, the self-protecting equipment cabinet, the protective tool cabinet, the construction equipment cabinet and the safety system used cabinet, and illuminating lamps are arranged at the tops of the movement areas; and movement channels are formed in the bottoms of the movement areas, dust-proof mats are arranged on the movement channels, and the dust-proof mats are connected with the movement channels through glue. According to the temperature-constant and drying intelligent cabinet for placing the electric power safety instruments and the using method, improvement of the management effect of the electric power instruments is facilitated, maintaining of the constant temperature and dryness of the interior of the instrument cabinet body is facilitated, and prolonging of the service life of the instruments is facilitated.