From 2011, newly developed Information textbook will be given to high school students. This research investigates contents of the new Information textbook and attempts to offer improvement of the book, which were compiled according to the 2007 Revised Curriculum. This thesis aims to make a comparative analysis of the contents and structure of six Information textbook which passed the screening. The structures of six textbooks were examined under four sections, which are overall structure, relative importance in the textbook, development method, and evaluation type. Moreover, for analyzing the contents, the research investigated the number of the major concepts that are dealt in the textbooks. The results show that there are too many difficult concepts for high school students and reveals that there are big difference in the contents and construction among textbooks. This research suggests how the textbook should be revised in the light of the contents, construction, terminology, and practical training.