Abstract: With the increasing level of China's economic development, the rapid development of science and technology has been greatly promoted, and various industries are striving to develop in the direction of intelligence and technology, and the construction industry is no exception. In construction project management, the rational introduction and application of smart construction site systems have greatly improved the efficiency and perfection of project management, and effectively realized the healthy and sustainable development of the construction industry. This article first elaborates the key technology of smart site construction. On this basis, it deeply researches the application of smart site system in construction project management, hoping to make the smart site system rationally apply to the construction project management, so as to effectively improve the construction Project management level.