Many people use the Internet which are connected by cables between terminals. For this reason, it may be crowded and not connected in the event of a disaster or emergency. It also has weaknesses that make it vulnerable to natural and human threats. This is a problem for the communication line of the local government office. Therefore, we propose a self-employed radio propagation path that can be constructed at low cost. An MCA line was set up for the outdoor trunk line, and an LPWA line was set up for communication inside the disaster stockpile storage building. An experiments were conducted in a university campus building. In order to obtain the effectiveness, we moved inside the building to find the optimum threshold. As a result, we were able to obtain feasible data. As a result of performance experiments with Wi-Fi and LPWA, it was found that LPWA is superior to Wi-Fi.