When searching for a rental property, information such as rent, breadth, time to station and age of a building is used. These indicators are quantitative data and can be compared. However, some conditions such as quiet and sunny are often described in comments in the remarks column are difficult to compare because there is ambiguity in the state recognition of each property. Therefore, indices that can quantitatively evaluate noise and sunrise are required. For indexing, it is necessary to collect data, but because the target is vacant, a data collection device can not use power from the outlet. Therefore, it is necessary to construct an IoT device capable of sensing environmental information without supplying power from the outlet. In this paper, we develop an environmental information sensing device under the constraint that there is no electricity in the vacant rental property and a no Internet environment. As a result of the demonstration experiment based on the cooperation of real estate agents, we showed the possibility that the proposed device can collect data.