The management of time and quality has always been the focus of Project Management in LED display screen engineering. In some projects, it is the reasonable application of project management that can promote the project to be completed on time and with high quality. LED display screen engineering is becoming more and more complex, and project management is very important. Project management is to use special knowledge, skills, tools and methods in project activities to enable projects to meet or exceed the needs and expectations of project stakeholders. Among them, project stakeholders refer to all the people who participate in the project and are affected by the project activities. Project time management includes all the processes that must be implemented to make the project complete on time. The main process includes activity definition, activity sequencing, activity resource estimation, activity duration estimation, schedule formulation and schedule control. The activity definition involves the specific activities that must be completed by project team members and project stakeholders to complete the deliverables of the project; The sorting of activities involves determining the dependencies between project activities and forming corresponding documents; Activity resource estimation involves estimating the type and quantity of resources needed to complete each planned activity; The estimation of activity duration involves estimating the number of working hours required to complete specific activities; Making a schedule involves analyzing the activity sequence, activity duration and resource requirements, as well as schedule constraints, so as to make a project schedule; Schedule control involves controlling and managing changes in project schedules. Project quality management is the process of integrating quality into the core process of project management and managing it. The process of project quality management includes all the activities needed to implement and organize to ensure that the project meets the original specified requirements, that is, all the activities that determine the quality policy, objectives and responsibilities, and implement the quality system through policies, procedures and processes such as quality planning, quality assurance, quality control and continuous quality improvement. The main processes include quality planning, implementation of quality assurance and implementation of quality control. In some projects, it is with the reasonable application of project management that the reasonable scheduling of different processes is planned, so that the processes are interrelated and mutually dependent. the results of one process often become the basis of another process, which eventually promotes the project to be completed on time and with high quality.