Can an instrument major take an examination of an information technology teacher?

You can't. There is no requirement for teachers' examination and compilation, but junior high school teachers' examination and compilation, senior high school teachers' examination and compilation, and university teachers' examination and compilation need the same major or similar major to apply for the exam. Instrument engineering is an engineering field that provides detection, measurement, monitoring and control devices, and does not belong to the category of information technology. If the major does not meet the requirements, it is impossible to take the exam. Instruments and meters are the comprehensive products of many kinds of science and technology, which are widely used, constantly updated and classified.