State Grid Quality Performance Certificate is an important document for State Grid Corporation to record and prove the quality management achievements. At work, we can use these vouchers to track and evaluate the quality performance of the project and ensure that the project is carried out in accordance with the prescribed standards and requirements. Through the record of vouchers, we can find and solve quality problems in time and improve work efficiency and quality level. Moreover, the voucher can also be used as proof of the work results, which can be used to show the quality and ability of our work to superior leaders and customers. Therefore, the use of State Grid Quality Performance Certificate can help us to better manage and improve the quality of our work.