The invention discloses a production line predictive maintenance system. The system comprises equipment data modules installed at all parts of a production line and used for driving and controlling operation data generated by work, an acquisition software module used for acquiring, analyzing, storing and uploading the equipment data modules, and a data transmission module used for carrying out network transmission on the acquired data, wherein the cloud server module is used for carrying out big data analysis, fault prediction and storage on the data transmitted by the data transmission module, and the data display module is used for carrying out WEB display on the structure analyzed and processed by the cloud server module, so an effective solution can be provided for the aspects of fault analysis, prediction and processing of the robot; important equipment such as an industrial robot and a PLC (Programmable Logic Controller) can be used as an important attention object, other equipment in a production line is integrated, monitored, analyzed and subjected to fault prediction through an independent hardware collector and configuration software, and meanwhile, a visual monitoring interface of a webpage end is provided, so the effective operation of the important equipment in the production line is ensured.