Support medical-related dictionaries such as MedDRA, WHODrug, multiple search methods, batch coding and batch review, maintenance of thesaurus and query thesaurus, and coding within projects; support one-click upload of official dictionaries, assign permissions by project, automatic coding and manual coding Combine. The information system solves the problems of cumbersome manual coding process and inconsistency before and after coding, and also avoids possible mistakes in manual coding, effectively improving the efficiency and quality of coding work.