According to different writing purposes, scientific papers can be divided into academic papers and degree papers. Academic papers are for publication in academic conferences or journals. Dissertation is to apply for the corresponding degree, to express the author's research results and to reflect the author's scientific research ability. Dissertations can be divided into bachelor's dissertations, master's dissertations and doctoral dissertations according to the degree applied. According to different research methods, scientific papers can be divided into theoretical, experimental and descriptive categories. The research methods used in theoretical papers are theoretical proof, theoretical analysis and mathematical reasoning, and scientific research results are obtained through these research methods. The experimental paper uses experimental methods to carry out experimental research and obtain scientific research results; Descriptive papers use the methods of description, comparison and explanation to study newly discovered things or phenomena and obtain scientific research results. According to different research fields, scientific papers can be divided into two categories: natural science academic papers and engineering technical academic papers. The text structure of these two kinds of papers is * * * type, which has long-term use and reference value.