Oyster mushroom is a plant that very dependent on the surrounding environment. There are some factors that must be considered in the cultivation of Oyster mushroom such as humidity, temperature and lighting in the cavity (not too bright but also not too dark). In line with the development of technology, a tool or media that can help to remote monitoring is needed. It can help the remote monitoring process more efficient. This kind of remote monitoring is using the internet of things (IoT) based android application. The results of temperature and humidity will be listed in the monthly report in android application, so that it can make it easier for farmers to analyze the condition of the oyster mushrooms. In this study the authors only monitor temperature and humidity. The test result for 3 days obtained an error value at a temperature of 10,5% on first day, 8% on second day, and 9,7% on third day. The humidity error value of 29,4% on first day, 24,3% on second day, and 25,3% on third day.