Abstract: Islands are an important part of natural resources. Currently, most of the islands in China are distributed in the form of island groups, archipelagos and island chains. Due to the wild and disorderly stone mining and development in the middle and late 20th century, most of the inhabited bedrock islands along the coast of China are generally suffering from slope instability. This not only threatens the lives and property of island residents, but also damages the ecological environment of the islands. Therefore, it is of great significance to monitor the slopes of the islands. Ensuring the stable and real-time transmission of slope monitoring data is the key to supporting the normal operation of the island slope monitoring system. However, there are still many gaps in the research on the monitoring of multiple slopes on multiple islands such as archipelagos. Therefore, taking 25 damaged slopes in the Changdao Archipelago as an example, the design of the monitoring network was carried out. For the three scenarios of communication among multiple slopes within a single island, communication between islands, and communication between the archipelago monitoring center and the remote land-based data center, the characteristics and applicability of several common wireless communication technologies (Wi-Fi, ZigBee, 4G/5G, LoRa and NB-IoT) were compared. A comprehensive evaluation was conducted based on multiple dimensions such as transmission distance, rate, delay, networking mode, battery life, stability and cost. The research found that the combination of LoRa and 4G technology can effectively meet the data transmission requirements among slopes within a single island. For communication between islands and between the archipelago monitoring center and the remote land-based data center, 4G technology is recommended to achieve efficient data exchange. Through the actual analysis of several damaged slopes in the Changdao Archipelago, the feasibility and effectiveness of the selected communication technology solution were verified. The research results can provide reference and guidance for the monitoring of slopes in other archipelagos.