The shape of most products is irregular and complex surface. The diversity and complexity of bonding objects should be considered in the intelligent coating equipment.In order to achieve the same size of glue application track at each corner, a precise glue application system for freeform surface was developed. The principle of the system, the design of software, hardware and control system were described in detail.Through the workpiece model, the accurate gluing track was set up, the glue line quality model was used to calculate the glue line size, the ultrahigh speed contour measuring instrument was used to measure the glue line size and carried on the feedback fine adjustment. It is verified that the equipment can meet the requirements of precise coating of curved parts through the coating test of automobile spoiler.The research results provide a scientific basis, method and innovative technology for the intelligent and accurate gelatinization robot.