The accessible military administration of key resources lacks real-time monitoring capabilities. When valuable goods are lost or stolen, they can only be evaluated and speculated about through post-event investigations and evidence collection. People cannot immediately locate the item's current location. Based on the foregoing, the NB IoT communication module, GPS positioning module, and buzzer are combined to make a positioning device. When key materials are active outdoors, the device's NB IoT SIM card is engaged, and the SIM card provides real-time location information to the cloud platform in real-time to ensure that real-time trends are understood, and the data is transmitted to the computer terminal. The administrator controls the terminal and can see the entire procedure without blind spots. AES encryption is new to ensure the safety of information during transmission. When installed on key materials, the management software will display the materials' position, movement tracking, environmental state, and other information in real-time, thereby meeting the needs for real-time monitoring, status monitoring, and anti-theft warning. © 2024 Elsevier B.V., All rights reserved.