Since the twenties of last century there have been four editions of the first volume of German Ideology by Marx and Engels: the edition compiled by Д.В.Рязанов, the edition by В.доратский, new German edition and MEGA2, which appeared successively in former Soviet and Eastern Europe. Hiromatu Wataru, a famous Japanese Marxist philosopher has published a book "German Ideology" in the Context of Philology. This book is a very important work in the philology of Marxist philosophy. It distinguishes the original text and revised one of the manuscript in the way of "double-paged typesetting and printing" and marks out the writings by Marx and Engels in this text in the variant forms of the characters. Although Hiromatu Wataru has had some affirmations that are not right, this does not make it a hindrance for us to carry out a serious investigation.