Preventive conservation of cultural heritage is a serious matter for people, especially for countries with a large patrimony. Enabling museums and culture heritage sites with recent technologies is one way to save these sites and enhance the visitor presence and experience. Augmented reality (AR) and internet of things (IoT) are recent technologies that can be deployed for such purposes. In this work, an end to end system structure is introduced for preventive conservation of museums based on the IoT. The system enables to monitor and indicate any climatic effects, and points for necessary maintenance. Moreover, the system employs the AR to help museums visitors to get much experience. An application interface is developed for both museum administrators and visitors to enable them to extract the associated data. A prototype is developed for the experimental evaluation and the results are indicated. © Springer Nature Switzerland AG 2018.