The present invention provides a denture model forming system based on cloud computing and a denture model forming method based on cloud computing. The system comprises: a interscan device or a dentalcast impression-taking device configured to obtain a three-dimensional digital image in a patient's mouth and three-dimensional oral and soft tissue images of a patient's mouth; a denture order generation device configured to import the three-dimensional digital image in the patient's mouth and the three-dimensional oral and soft tissue images of the patient's mouth to perform data overlapping toestablish an intraoral three-dimensional model and generate a denture order; a cloud server is configured to obtain a denture model for user personalized filling through calculation according to theintraoral three-dimensional model and a standard intraoral three-dimensional model stored in advance; and a denture generation device configured to receive the denture model for user personalized filling and cutting or printing a denture for user personalized filling. The denture model forming system based on cloud computing and the denture model forming method based on cloud computing can quicklyobtain a denture model of the user personalized filling in a cloud and directly process the denture model of the user personalized filling locally to make the processing process efficient and convenient for users.