The purpose of this article is to examine problems of hierarchy methods of reading ability and text readability level. There are two ways to arrange in a hierarchy about the level of reader's reading ability and text readability. The one is to categorize the presented indicators when the students read books and the other one is to measure by examination tools. The hierarchy of reading ability and readability is able to solve some problems which concerned teaching- learning activities by inspecting learner's responses and thinking aspects. The weakness of both methods should be supplemented to arrange more rational and scientific hierarchy methods about reading ability and readability. The hierarchy of reader's reading ability should be blended the variables of affective domain, the indicators of development and the results of measuring by tools. The hierarchy of text readability level needs to set various variables for analyzing text and to build dualistic system which have computerizing process and professional consultation.