The present invention belongs to the nuclear power station instrumentation and control system technology field, and in order to overcome the technical problem in the prior art that the calibration and test data is analyzed artificially, provides an automatic test device and method of simulating a current transducer signal by which the data can be analyzed automatically. The device comprises a memorizer in which the transducer models of various types and the indexing tables corresponding to the transducer models respectively are stored, wherein the predetermined input conditions and the output currents corresponding to the predetermined input conditions are stored in the indexing tables; a controller used for determining a specific output current based on the inputted transducers of the specific types and the inputted specific preset test conditions and from the indexing tables corresponding to the transducers of the specific types and the specific preset test conditions; and a current transducer used for generating a predetermined electric signal, and outputting to a to-be-tested instrument.