INDICATION DIAGNOSIS DEVICE AND METHOD

An abnormality sign diagnosis apparatus and an abnormality sign diagnosis method for predicting abnormality highly accurately are provided. The abnormality sign diagnosis apparatus uses measurement data on equipment in operation to find a difference between previously acquired data on the equipment in normal operation and the measurement data on the equipment at a time targeted for diagnosis so as to detect abnormality of the equipment. The abnormality sign diagnosis apparatus includes: input means that inputs the measurement data on the equipment in operation and a surrounding environment and status of the equipment in operation; storage means that stores the data on the equipment in normal operation; and processing means that selects from the storage means the data on the equipment in normal operation in a surrounding environment and status of the equipment similar to the surrounding environment and the status of the equipment at a time which is targeted for diagnosis and at which the data on the equipment in normal operation has been measured, the processing means further detecting abnormality of the equipment using the data of the equipment in normal operation at the time targeted for diagnosis and the data on the equipment in normal operation selected from the storage means.