Descriptive contents and attitude varies depending on descriptive viewpoint of grammar. Grammatical attitude of school grammar, language norms, and normative dictionary not describes grammar as it is but selects and adjusts depending on given viewpoint. Normative viewpoint needs standard of grammar technology, because only grammatical phenomenon is not a basis for grammar technology. As principle needed when grammar is normatively described, this thesis suggests two principles such as first, target and application scope of grammar technology should be obvious, and second, a result of grammar technology should be expected. The researcher thinks that these principles are commonly showed in normative grammar technology used in present norms, dictionary, school grammar, and grammar for Korean education, and will be a starting point of in-depth discussion about normative viewpoint of grammar. If language is like a continuously-changing organism, the appropriateness of the viewpoint understanding grammar fixedly at one point and viewpoint can be admitted. There is high probability of this viewpoint to be suited to fields needing regular system, procedure, and completeness such as education, learning, and evaluation. In the future, this scope can be expanded to a relation with descriptive grammar and a relation with grammar ability needed in speech community. This discussion will help not only in enlarging the understanding of normative grammar but also in understanding a relation with descriptive grammar and grammar wholly.