The invention belongs to the field of hemodialysis management technology, and particularly relates to a hemodialysis online management system based on Internet-of-things. The system comprises an Internet-of-things module, a hemodialysis module and a patient to-be-diagnosed module. The Internet-of-things module and the hemodialysis module perform bidirectional information exchange. The Internet-of-things module and the patient to-be-diagnosed module perform bidirectional information exchange. The Internet-of-things module is mainly composed of a server and a data storage terminal. Information of the server is stored in the data storage terminal. The hemodialysis module comprises hemodialysis equipment. The hemodialysis equipment of the hemodialysis module transmits hemodialysis informationto the server of the Internet-of-things module. The server performs feedback of to-be-hemodialyzed personnel information to the hemodialysis information. Bidirectional information transmission is performed between a user terminal in the patient to-be-diagnosed module and the server through a network, thereby realizing information transmission and feedback. The whole hemodialysis diagnosis-and-treatment management is based on the server. Online management of hemodialysis is realized through cooperation between the server and the Internet-of-things. The input cost of a hospital at an aspect of increasing medical nursing personnel is reduced.