1. An apparatus for providing a two-way automatic interpretation and translation service, comprising: a first interpretation and translation unit for interpreting and translating a first language into a second language; a second interpretation and translation unit for interpreting and translating the second language into the first language; and a context information management unit for receiving conversational context and translation history information processed when translation is performed from the first and second interpretation and translation units, and sharing and managing the conversational context and translation history information, wherein each of the first and second interpretation and translation units provides an interpretation service for receiving an input conversation in the first language or the second language in a form of speech and outputting results of interpretation of the input conversation in the form of speech in the second language or the first language, and a translation service for receiving an input conversation in the first language or the second language in a form of text and outputting results of translation of the input conversation in a form of text in the second language or the first language.