The EC9000 certification is primarily used for quality management system certification for construction companies in engineering projects. To enhance the quality management of construction companies, obtaining the EC9000 quality system certification is highly necessary. The EC9000 certification was drafted by the Ministry of Construction to strengthen the quality management of construction companies in engineering projects, including the signing of engineering and construction contracts, site surveys, design of construction drawings, preparation of operational guidelines for construction-related activities, material and equipment delivery, construction process management and inspection, internal acceptance, final delivery acceptance, handover of documents, and warranty services. The purpose of obtaining the EC9000 certification is to further strengthen and implement the quality responsibility by promoting the implementation of GB/T50430, improve corporate self-discipline and quality management levels, and promote the scientific, standardized, and legal management of construction company quality. The EC9000 certification is characterized by its guidance, flexibility.