The invention provides a medical and health management system based on big data. The system comprises a case management subsystem. The medical and health management system is characterized in that the case management subsystem comprises a case analysis module, a patient takes a photo of a case and uploads the photo through a client side, analysis and classification are performed through an application server, the case is converted into a wordpages formatted file to be stored in a storage server, an early warning is given out if testing data of testing items are higher than a normal value and sent to the client side, an outpatient prescription in the case is sent to an artificial background terminal, and the accuracy of the outpatient prescription is artificially recognized. By recording patient cases, examination results, healthy living way, treatment conditions at any time, prognosis conditions, follow-up visit conditions, hospital diagnosis and treatment process optimization, network medicine purchasing and a doctor-patient communication platform, particularly on the basis of large-data analysis, the health conditions of a patient are known at any time, a sanitary system can achieve guidance conveniently, expense budget and monitoring are achieved, and the intelligent and user-friendly degree is high.