The invention relates to the technical field of management of building engineering construction sites, and discloses a real-time dynamic management system of building engineering construction, and a work method thereof. The real-time dynamic management system comprises a card-swiping information adapter, a liquid crystal display, a retractable door, a gateway and an intelligent dynamic information management card. The card-swiping information adapter and the liquid crystal display are connected to a central processing module respectively; both the retractable door and the gateway are provided with door opening or closing control devices; and the intelligent dynamic information management card comprises a positioning device, a screen and an alarm device. The real-time dynamic management system realizes automation and intelligentization of the management of the building engineering construction sites. Foreign staff and vehicles can not enter a construction region without the intelligent dynamic information management card, so that some security risks can be reduced. The staff and vehicles in the construction region can be monitored and managed in real time; when the staff or vehicles are in danger, the alarm device is started, so that rescues can be implemented in time according to the displaying position of the staff or the vehicles, thereby overcoming the technical problems of difficulty for seeking missing staff and non-timely rescue during the construction rescues in the prior art.