The core prescription on textbook review and approval is not mentioned in the blank authority of the Ministry of Education in the revised Act 8-2 of Compulsory Education Law in 1999. To compare with the regulations and the other generalized authorization to the Committee for Review and Approval Textbooks, it is not able to infer the intention by the law makers to authorize the Ministry of Education to make related regulations to authorize and approve textbooks. Because of the review and approval of textbooks is involved in the freedom of speech, freedom of the press, and basic rights of compulsory education, the review and approval of textbooks, apart from the related ordinance, needs to be conformed to the principle of explicitness. This article intends to examine and discuss whether the law and decree of textbook review and approval are in violation of the law and the constitution based on the principle of law by means of document analysis. In the meantime, this article intends to explore the legality of review and approval of textbooks under the administrative disciplinary action. In the meantime, this article tries to point out the defects in related regulations and to provide orientation for law revisions to the related organization for reference. Finally, this article provides the suggested revision of the Act 8-2 of Compulsory Education Law, the Regulations for Review and Approval of Elementary School Textbooks, the Organization and Operation of Committee for Review and Approval Textbooks, and the Guidelines of Curriculum based on the findings of this research for reference.