This book mainly focuses on the systematic thinking and exploration of the theoretical and practical issues of language standardization, focusing on the in-depth analysis of the normative issues in language life, language teaching, and language work and the applied linguistic theories contained therein. The book mainly includes four aspects: one is to analyze the basic principles, basis and strategies of language standardization from the academic level; the other is to make a comprehensive and systematic investigation of certain specific norms since the founding of New China, such as more than sixty years. The change process and influencing factors of language norms and concepts embodied in modern Chinese textbooks and college entrance examination papers; the third is the normative method and communicative value of certain special language phenomena such as network language and dictionary compilation from the perspective of language value and linguistic value Re-understanding; fourth is to make theoretical reflections on the basic issues of applied linguistics. These studies include both qualitative thinking and quantitative investigation, qualitative guidance and quantitative services, and qualitative services.