The invention relates to the technical field of e-commerce, and discloses a commodity sales system and method based on e-commerce, and the system comprises a client terminal, an e-commerce terminal and a cloud processor, and the cloud processor is connected with the client terminal and the e-commerce terminal through a communication network. The client terminal comprises a transaction information statistics module, a login terminal identification module, a comment time identification module and an information login module. Scoring and grading are carried out through commodity scoring grades, grading is carried out according to commodity scores and good comments, when the commodity priority ranking is the same, the shop priority ranking module carries out commodity ranking reference according to the shop priority sequence, and therefore commodity ranking is completed, it is effectively guaranteed that high-quality products are ranked in the front, scalping comments and false good comments are reduced, the influence of malicious bad comments on shopping behaviors is avoided, good shopping experience is ensured, the shopping difficulty is reduced, the most real comment information of commodities can be completely known in each shopping, and the shopping enthusiasm of consumers is ensured.