The invention relates to the technical field of livestock product tracing, in particular to a tracing system and method for whole-process tracing and displaying of livestock product breeding, transporting, processing and selling information. According to the invention, the information of each link of the traceability system is uploaded to the cloud public platform, so that the information transparency of the animal husbandry product is realized. The cloud platform collects the whole process information of the animal husbandry products from production to sales; Once a user of a livestock product uses the product and has diseases and other undesirable conditions, all public information of the production process of the product can be checked through a website or a mobile phone app, so that the user can accurately find a problem link, correct responsibilities accurately and reduce disputes of all parties.