A terminal discriminating apparatus and a terminal discriminating method using the same are provided. The terminal discriminating apparatus includes: a measurement unit for measuring a pull-up voltage and a pull-down voltage of each of candidate terminals to be discriminated; a discriminating unit for comparing the pull-up voltages, pull-down voltages, and the differences between the pull-up voltages and pull-down voltages for the candidate terminals to discriminate the types of the candidate terminals; and an output unit for outputting results of the discrimination of the candidate terminals transferred from the discriminating unit. The types of the candidate terminals can be discriminated by comparing the pull-up voltage, the pull-down voltage, and the differences between the pull-up voltages and the pull-down voltages for the candidate terminals.