School duplicate checking is to check the duplicate of graduation thesis through the duplicate checking system of HowNet. The comparative database includes Internet resource database, academic journal database, master's and doctoral thesis database, etc. After repeated checking, the generated report will show the repetition rate after deleting my published document and the repetition rate after deleting the referenced document. School duplication checking is mainly to detect whether there are academic misconduct such as plagiarism in papers, and it can also help authors understand the writing quality and originality of their papers.

Personal duplicate checking of HowNet is to check the duplicates of documents that need to be detected through the duplicate checking system of HowNet. Comparative databases include Internet resource databases, academic journals databases, master's and doctoral dissertations databases, etc. The report generated after repeated checking will show the repetition rate after removing the referenced documents. Personal duplicate checking is mainly to detect whether there are academic misconduct such as plagiarism in the documents written by oneself, and it can also help the author to understand the originality and similarity of the documents written by himself.

So although they all use HowNet system to check the duplicate, they are not the same.