Instrumental texts, as an important part of the textbooks, play an important role in organizing the teaching content and the teaching activities, facilitating the communication of the teacher, students and textbooks. Therefore, it is of great theoretical and practical significance to study and evaluate the instrumental texts of the textbooks. The instrumental texts in Market Leader is adopted as the research object. Content analysis and corpus analysis are applied in this paper. By retrieving their salient lexical and semantic patterns which are further associated with some modern concepts in ESP education, the book is evaluated from the perspective of cognitive strategy, learning styles, the relationship between teaching materials and learners and contextualized language instructions. The results of this study are as following: 1) Teaching notions can be reflected from the instrumental texts. 2) Cooperative learning and learners-centered approach are well shown in this book. Cognitive thinking and situation creation are relatively weak in this book.